Calculus Examples

$y x^{4} d x = (1 + x^{2}) y^{\frac{1}{2}} d y$

Step 1

Rewrite the equation.

$(1 + x^{2}) y^{\frac{1}{2}} d y = y x^{4} d x$

Step 2

Multiply both sides by $\frac{1}{(1 + x^{2}) y}$ .

$\frac{1}{(1 + x^{2}) y} ((1 + x^{2}) y^{\frac{1}{2}}) d y = \frac{1}{(1 + x^{2}) y} (y x^{4}) d x$

Step 3

Simplify.

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Step 3.1

Cancel the common factor of $1 + x^{2}$ .

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Step 3.1.1

Factor $1 + x^{2}$ out of $(1 + x^{2}) y$ .

$\frac{1}{(1 + x^{2}) (y)} ((1 + x^{2}) y^{\frac{1}{2}}) d y = \frac{1}{(1 + x^{2}) y} (y x^{4}) d x$

Step 3.1.2

Factor $1 + x^{2}$ out of $(1 + x^{2}) y^{\frac{1}{2}}$ .

$\frac{1}{(1 + x^{2}) (y)} ((1 + x^{2}) (y^{\frac{1}{2}})) d y = \frac{1}{(1 + x^{2}) y} (y x^{4}) d x$

Step 3.1.3

Cancel the common factor.

$\frac{1}{(1 + x^{2}) y} ((1 + x^{2}) y^{\frac{1}{2}}) d y = \frac{1}{(1 + x^{2}) y} (y x^{4}) d x$

Step 3.1.4

Rewrite the expression.

$\frac{1}{y} y^{\frac{1}{2}} d y = \frac{1}{(1 + x^{2}) y} (y x^{4}) d x$

Step 3.2

Combine $\frac{1}{y}$ and $y^{\frac{1}{2}}$ .

$\frac{y^{\frac{1}{2}}}{y} d y = \frac{1}{(1 + x^{2}) y} (y x^{4}) d x$

Step 3.3

Move $y^{\frac{1}{2}}$ to the denominator using the negative exponent rule $b^{n} = \frac{1}{b^{- n}}$ .

$\frac{1}{y \cdot y^{- \frac{1}{2}}} d y = \frac{1}{(1 + x^{2}) y} (y x^{4}) d x$

Step 3.4

Multiply $y$ by $y^{- \frac{1}{2}}$ by adding the exponents.

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Step 3.4.1

Multiply $y$ by $y^{- \frac{1}{2}}$ .

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Step 3.4.1.1

Raise $y$ to the power of $1$ .

$\frac{1}{y^{1} y^{- \frac{1}{2}}} d y = \frac{1}{(1 + x^{2}) y} (y x^{4}) d x$

Step 3.4.1.2

Use the power rule $a^{m} a^{n} = a^{m + n}$ to combine exponents.

$\frac{1}{y^{1 - \frac{1}{2}}} d y = \frac{1}{(1 + x^{2}) y} (y x^{4}) d x$

Step 3.4.2

Write $1$ as a fraction with a common denominator.

$\frac{1}{y^{\frac{2}{2} - \frac{1}{2}}} d y = \frac{1}{(1 + x^{2}) y} (y x^{4}) d x$

Step 3.4.3

Combine the numerators over the common denominator.

$\frac{1}{y^{\frac{2 - 1}{2}}} d y = \frac{1}{(1 + x^{2}) y} (y x^{4}) d x$

Step 3.4.4

Subtract $1$ from $2$ .

$\frac{1}{y^{\frac{1}{2}}} d y = \frac{1}{(1 + x^{2}) y} (y x^{4}) d x$

Step 3.5

Cancel the common factor of $y$ .

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Step 3.5.1

Factor $y$ out of $(1 + x^{2}) y$ .

$\frac{1}{y^{\frac{1}{2}}} d y = \frac{1}{y (1 + x^{2})} (y x^{4}) d x$

Step 3.5.2

Factor $y$ out of $y x^{4}$ .

$\frac{1}{y^{\frac{1}{2}}} d y = \frac{1}{y (1 + x^{2})} (y (x^{4})) d x$

Step 3.5.3

Cancel the common factor.

$\frac{1}{y^{\frac{1}{2}}} d y = \frac{1}{y (1 + x^{2})} (y x^{4}) d x$

Step 3.5.4

Rewrite the expression.

$\frac{1}{y^{\frac{1}{2}}} d y = \frac{1}{1 + x^{2}} x^{4} d x$

Step 3.6

Combine $\frac{1}{1 + x^{2}}$ and $x^{4}$ .

$\frac{1}{y^{\frac{1}{2}}} d y = \frac{x^{4}}{1 + x^{2}} d x$

Step 4

Integrate both sides.

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Step 4.1

Set up an integral on each side.

$\int \frac{1}{y^{\frac{1}{2}}} d y = \int \frac{x^{4}}{1 + x^{2}} d x$

Step 4.2

Integrate the left side.

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Step 4.2.1

Apply basic rules of exponents.

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Step 4.2.1.1

Move $y^{\frac{1}{2}}$ out of the denominator by raising it to the $- 1$ power.

$\int {(y^{\frac{1}{2}})}^{- 1} d y = \int \frac{x^{4}}{1 + x^{2}} d x$

Step 4.2.1.2

Multiply the exponents in ${(y^{\frac{1}{2}})}^{- 1}$ .

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Step 4.2.1.2.1

Apply the power rule and multiply exponents, ${(a^{m})}^{n} = a^{m n}$ .

$\int y^{\frac{1}{2} \cdot - 1} d y = \int \frac{x^{4}}{1 + x^{2}} d x$

Step 4.2.1.2.2

Combine $\frac{1}{2}$ and $- 1$ .

$\int y^{\frac{- 1}{2}} d y = \int \frac{x^{4}}{1 + x^{2}} d x$

Step 4.2.1.2.3

Move the negative in front of the fraction.

$\int y^{- \frac{1}{2}} d y = \int \frac{x^{4}}{1 + x^{2}} d x$

Step 4.2.2

By the Power Rule, the integral of $y^{- \frac{1}{2}}$ with respect to $y$ is $2 y^{\frac{1}{2}}$ .

$2 y^{\frac{1}{2}} + C_{1} = \int \frac{x^{4}}{1 + x^{2}} d x$

Step 4.3

Integrate the right side.

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Step 4.3.1

Reorder $1$ and $x^{2}$ .

$2 y^{\frac{1}{2}} + C_{1} = \int \frac{x^{4}}{x^{2} + 1} d x$

Step 4.3.2

Divide $x^{4}$ by $x^{2} + 1$ .

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Step 4.3.2.1

Set up the polynomials to be divided. If there is not a term for every exponent, insert one with a value of $0$ .

$x^{2}$

$0 x$

$1$

$x^{4}$

$0 x^{3}$

$0 x^{2}$

$0 x$

$0$

Step 4.3.2.2

Divide the highest order term in the dividend $x^{4}$ by the highest order term in divisor $x^{2}$ .

$x^{2}$

$0 x$

$1$

$x^{4}$

$0 x^{3}$

$0 x^{2}$

$0 x$

$0$

Step 4.3.2.3

Multiply the new quotient term by the divisor.

$x^{2}$

$0 x$

$1$

$x^{4}$

$0 x^{3}$

$0 x^{2}$

$0 x$

$0$

$x^{4}$

$0$

$x^{2}$

Step 4.3.2.4

The expression needs to be subtracted from the dividend, so change all the signs in $x^{4} + 0 + x^{2}$

$x^{2}$

$0 x$

$1$

$x^{4}$

$0 x^{3}$

$0 x^{2}$

$0 x$

$0$

$x^{4}$

$0$

$x^{2}$

Step 4.3.2.5

After changing the signs, add the last dividend from the multiplied polynomial to find the new dividend.

$x^{2}$

$0 x$

$1$

$x^{4}$

$0 x^{3}$

$0 x^{2}$

$0 x$

$0$

$x^{4}$

$0$

$x^{2}$

Step 4.3.2.6

Pull the next term from the original dividend down into the current dividend.

$x^{2}$

$0 x$

$1$

$x^{4}$

$0 x^{3}$

$0 x^{2}$

$0 x$

$0$

$x^{4}$

$0$

$x^{2}$

$0 x$

$0$

Step 4.3.2.7

Divide the highest order term in the dividend $- x^{2}$ by the highest order term in divisor $x^{2}$ .

$x^{2}$

$0 x$

$1$

$x^{2}$

$0 x$

$1$

$x^{4}$

$0 x^{3}$

$0 x^{2}$

$0 x$

$0$

$x^{4}$

$0$

$x^{2}$

$0 x$

$0$

Step 4.3.2.8

Multiply the new quotient term by the divisor.

$x^{2}$

$0 x$

$1$

$x^{2}$

$0 x$

$1$

$x^{4}$

$0 x^{3}$

$0 x^{2}$

$0 x$

$0$

$x^{4}$

$0$

$x^{2}$

$0 x$

$0$

$x^{2}$

$0$

$1$

Step 4.3.2.9

The expression needs to be subtracted from the dividend, so change all the signs in $- x^{2} + 0 - 1$

$x^{2}$

$0 x$

$1$

$x^{2}$

$0 x$

$1$

$x^{4}$

$0 x^{3}$

$0 x^{2}$

$0 x$

$0$

$x^{4}$

$0$

$x^{2}$

$0 x$

$0$

$x^{2}$

$0$

$1$

Step 4.3.2.10

After changing the signs, add the last dividend from the multiplied polynomial to find the new dividend.

$x^{2}$

$0 x$

$1$

$x^{2}$

$0 x$

$1$

$x^{4}$

$0 x^{3}$

$0 x^{2}$

$0 x$

$0$

$x^{4}$

$0$

$x^{2}$

$0 x$

$0$

$x^{2}$

$0$

$1$

Step 4.3.2.11

The final answer is the quotient plus the remainder over the divisor.

$2 y^{\frac{1}{2}} + C_{1} = \int x^{2} - 1 + \frac{1}{x^{2} + 1} d x$

Step 4.3.3

Split the single integral into multiple integrals.

$2 y^{\frac{1}{2}} + C_{1} = \int x^{2} d x + \int - 1 d x + \int \frac{1}{x^{2} + 1} d x$

Step 4.3.4

By the Power Rule, the integral of $x^{2}$ with respect to $x$ is $\frac{1}{3} x^{3}$ .

$2 y^{\frac{1}{2}} + C_{1} = \frac{1}{3} x^{3} + C_{2} + \int - 1 d x + \int \frac{1}{x^{2} + 1} d x$

Step 4.3.5

Apply the constant rule.

$2 y^{\frac{1}{2}} + C_{1} = \frac{1}{3} x^{3} + C_{2} - x + C_{3} + \int \frac{1}{x^{2} + 1} d x$

Step 4.3.6

Simplify the expression.

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Step 4.3.6.1

Reorder $x^{2}$ and $1$ .

$2 y^{\frac{1}{2}} + C_{1} = \frac{1}{3} x^{3} + C_{2} - x + C_{3} + \int \frac{1}{1 + x^{2}} d x$

Step 4.3.6.2

Rewrite $1$ as $1^{2}$ .

$2 y^{\frac{1}{2}} + C_{1} = \frac{1}{3} x^{3} + C_{2} - x + C_{3} + \int \frac{1}{1^{2} + x^{2}} d x$

Step 4.3.7

The integral of $\frac{1}{1^{2} + x^{2}}$ with respect to $x$ is $\arctan (x) + C_{4}$ .

$2 y^{\frac{1}{2}} + C_{1} = \frac{1}{3} x^{3} + C_{2} - x + C_{3} + \arctan (x) + C_{4}$

Step 4.3.8

Simplify.

$2 y^{\frac{1}{2}} + C_{1} = \frac{1}{3} x^{3} - x + \arctan (x) + C_{5}$

Step 4.4

Group the constant of integration on the right side as $K$ .

$2 y^{\frac{1}{2}} = \frac{1}{3} x^{3} - x + \arctan (x) + K$

Step 5

Solve for $y$ .

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Step 5.1

Divide each term in $2 y^{\frac{1}{2}} = \frac{1}{3} x^{3} - x + \arctan (x) + K$ by $2$ and simplify.

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Step 5.1.1

Divide each term in $2 y^{\frac{1}{2}} = \frac{1}{3} x^{3} - x + \arctan (x) + K$ by $2$ .

$\frac{2 y^{\frac{1}{2}}}{2} = \frac{\frac{1}{3} x^{3}}{2} + \frac{- x}{2} + \frac{\arctan (x)}{2} + \frac{K}{2}$

Step 5.1.2

Simplify the left side.

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Step 5.1.2.1

Cancel the common factor.

$\frac{2 y^{\frac{1}{2}}}{2} = \frac{\frac{1}{3} x^{3}}{2} + \frac{- x}{2} + \frac{\arctan (x)}{2} + \frac{K}{2}$

Step 5.1.2.2

Divide $y^{\frac{1}{2}}$ by $1$ .

$y^{\frac{1}{2}} = \frac{\frac{1}{3} x^{3}}{2} + \frac{- x}{2} + \frac{\arctan (x)}{2} + \frac{K}{2}$

Step 5.1.3

Simplify the right side.

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Step 5.1.3.1

Simplify each term.

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Step 5.1.3.1.1

Combine $\frac{1}{3}$ and $x^{3}$ .

$y^{\frac{1}{2}} = \frac{\frac{x^{3}}{3}}{2} + \frac{- x}{2} + \frac{\arctan (x)}{2} + \frac{K}{2}$

Step 5.1.3.1.2

Multiply the numerator by the reciprocal of the denominator.

$y^{\frac{1}{2}} = \frac{x^{3}}{3} \cdot \frac{1}{2} + \frac{- x}{2} + \frac{\arctan (x)}{2} + \frac{K}{2}$

Step 5.1.3.1.3

Combine.

$y^{\frac{1}{2}} = \frac{x^{3} \cdot 1}{3 \cdot 2} + \frac{- x}{2} + \frac{\arctan (x)}{2} + \frac{K}{2}$

Step 5.1.3.1.4

Multiply $x^{3}$ by $1$ .

$y^{\frac{1}{2}} = \frac{x^{3}}{3 \cdot 2} + \frac{- x}{2} + \frac{\arctan (x)}{2} + \frac{K}{2}$

Step 5.1.3.1.5

Multiply $3$ by $2$ .

$y^{\frac{1}{2}} = \frac{x^{3}}{6} + \frac{- x}{2} + \frac{\arctan (x)}{2} + \frac{K}{2}$

Step 5.1.3.1.6

Move the negative in front of the fraction.

$y^{\frac{1}{2}} = \frac{x^{3}}{6} - \frac{x}{2} + \frac{\arctan (x)}{2} + \frac{K}{2}$

Step 5.2

Raise each side of the equation to the power of $2$ to eliminate the fractional exponent on the left side.

${(y^{\frac{1}{2}})}^{2} = {(\frac{x^{3}}{6} - \frac{x}{2} + \frac{\arctan (x)}{2} + \frac{K}{2})}^{2}$

Step 5.3

Simplify the exponent.

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Step 5.3.1

Simplify the left side.

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Step 5.3.1.1

Simplify ${(y^{\frac{1}{2}})}^{2}$ .

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Step 5.3.1.1.1

Multiply the exponents in ${(y^{\frac{1}{2}})}^{2}$ .

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Step 5.3.1.1.1.1

Apply the power rule and multiply exponents, ${(a^{m})}^{n} = a^{m n}$ .

$y^{\frac{1}{2} \cdot 2} = {(\frac{x^{3}}{6} - \frac{x}{2} + \frac{\arctan (x)}{2} + \frac{K}{2})}^{2}$

Step 5.3.1.1.1.2

Cancel the common factor of $2$ .

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Step 5.3.1.1.1.2.1

Cancel the common factor.

$y^{\frac{1}{2} \cdot 2} = {(\frac{x^{3}}{6} - \frac{x}{2} + \frac{\arctan (x)}{2} + \frac{K}{2})}^{2}$

Step 5.3.1.1.1.2.2

Rewrite the expression.

$y^{1} = {(\frac{x^{3}}{6} - \frac{x}{2} + \frac{\arctan (x)}{2} + \frac{K}{2})}^{2}$

Step 5.3.1.1.2

Simplify.

$y = {(\frac{x^{3}}{6} - \frac{x}{2} + \frac{\arctan (x)}{2} + \frac{K}{2})}^{2}$

Step 5.3.2

Simplify the right side.

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Step 5.3.2.1

Simplify ${(\frac{x^{3}}{6} - \frac{x}{2} + \frac{\arctan (x)}{2} + \frac{K}{2})}^{2}$ .

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Step 5.3.2.1.1

Rewrite ${(\frac{x^{3}}{6} - \frac{x}{2} + \frac{\arctan (x)}{2} + \frac{K}{2})}^{2}$ as $(\frac{x^{3}}{6} - \frac{x}{2} + \frac{\arctan (x)}{2} + \frac{K}{2}) (\frac{x^{3}}{6} - \frac{x}{2} + \frac{\arctan (x)}{2} + \frac{K}{2})$ .

$y = (\frac{x^{3}}{6} - \frac{x}{2} + \frac{\arctan (x)}{2} + \frac{K}{2}) (\frac{x^{3}}{6} - \frac{x}{2} + \frac{\arctan (x)}{2} + \frac{K}{2})$

Step 5.3.2.1.2

Expand $(\frac{x^{3}}{6} - \frac{x}{2} + \frac{\arctan (x)}{2} + \frac{K}{2}) (\frac{x^{3}}{6} - \frac{x}{2} + \frac{\arctan (x)}{2} + \frac{K}{2})$ by multiplying each term in the first expression by each term in the second expression.

$y = \frac{x^{3}}{6} \cdot \frac{x^{3}}{6} + \frac{x^{3}}{6} (- \frac{x}{2}) + \frac{x^{3}}{6} \cdot \frac{\arctan (x)}{2} + \frac{x^{3}}{6} \cdot \frac{K}{2} - \frac{x}{2} \cdot \frac{x^{3}}{6} - \frac{x}{2} (- \frac{x}{2}) - \frac{x}{2} \cdot \frac{\arctan (x)}{2} - \frac{x}{2} \cdot \frac{K}{2} + \frac{\arctan (x)}{2} \cdot \frac{x^{3}}{6} + \frac{\arctan (x)}{2} (- \frac{x}{2}) + \frac{\arctan (x)}{2} \cdot \frac{\arctan (x)}{2} + \frac{\arctan (x)}{2} \cdot \frac{K}{2} + \frac{K}{2} \cdot \frac{x^{3}}{6} + \frac{K}{2} (- \frac{x}{2}) + \frac{K}{2} \cdot \frac{\arctan (x)}{2} + \frac{K}{2} \cdot \frac{K}{2}$

Step 5.3.2.1.3

Simplify terms.

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Step 5.3.2.1.3.1

Simplify each term.

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Step 5.3.2.1.3.1.1

Combine.

$y = \frac{x^{3} x^{3}}{6 \cdot 6} + \frac{x^{3}}{6} (- \frac{x}{2}) + \frac{x^{3}}{6} \cdot \frac{\arctan (x)}{2} + \frac{x^{3}}{6} \cdot \frac{K}{2} - \frac{x}{2} \cdot \frac{x^{3}}{6} - \frac{x}{2} (- \frac{x}{2}) - \frac{x}{2} \cdot \frac{\arctan (x)}{2} - \frac{x}{2} \cdot \frac{K}{2} + \frac{\arctan (x)}{2} \cdot \frac{x^{3}}{6} + \frac{\arctan (x)}{2} (- \frac{x}{2}) + \frac{\arctan (x)}{2} \cdot \frac{\arctan (x)}{2} + \frac{\arctan (x)}{2} \cdot \frac{K}{2} + \frac{K}{2} \cdot \frac{x^{3}}{6} + \frac{K}{2} (- \frac{x}{2}) + \frac{K}{2} \cdot \frac{\arctan (x)}{2} + \frac{K}{2} \cdot \frac{K}{2}$

Step 5.3.2.1.3.1.2

Multiply $x^{3}$ by $x^{3}$ by adding the exponents.

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Step 5.3.2.1.3.1.2.1

Use the power rule $a^{m} a^{n} = a^{m + n}$ to combine exponents.

$y = \frac{x^{3 + 3}}{6 \cdot 6} + \frac{x^{3}}{6} (- \frac{x}{2}) + \frac{x^{3}}{6} \cdot \frac{\arctan (x)}{2} + \frac{x^{3}}{6} \cdot \frac{K}{2} - \frac{x}{2} \cdot \frac{x^{3}}{6} - \frac{x}{2} (- \frac{x}{2}) - \frac{x}{2} \cdot \frac{\arctan (x)}{2} - \frac{x}{2} \cdot \frac{K}{2} + \frac{\arctan (x)}{2} \cdot \frac{x^{3}}{6} + \frac{\arctan (x)}{2} (- \frac{x}{2}) + \frac{\arctan (x)}{2} \cdot \frac{\arctan (x)}{2} + \frac{\arctan (x)}{2} \cdot \frac{K}{2} + \frac{K}{2} \cdot \frac{x^{3}}{6} + \frac{K}{2} (- \frac{x}{2}) + \frac{K}{2} \cdot \frac{\arctan (x)}{2} + \frac{K}{2} \cdot \frac{K}{2}$

Step 5.3.2.1.3.1.2.2

Add $3$ and $3$ .

$y = \frac{x^{6}}{6 \cdot 6} + \frac{x^{3}}{6} (- \frac{x}{2}) + \frac{x^{3}}{6} \cdot \frac{\arctan (x)}{2} + \frac{x^{3}}{6} \cdot \frac{K}{2} - \frac{x}{2} \cdot \frac{x^{3}}{6} - \frac{x}{2} (- \frac{x}{2}) - \frac{x}{2} \cdot \frac{\arctan (x)}{2} - \frac{x}{2} \cdot \frac{K}{2} + \frac{\arctan (x)}{2} \cdot \frac{x^{3}}{6} + \frac{\arctan (x)}{2} (- \frac{x}{2}) + \frac{\arctan (x)}{2} \cdot \frac{\arctan (x)}{2} + \frac{\arctan (x)}{2} \cdot \frac{K}{2} + \frac{K}{2} \cdot \frac{x^{3}}{6} + \frac{K}{2} (- \frac{x}{2}) + \frac{K}{2} \cdot \frac{\arctan (x)}{2} + \frac{K}{2} \cdot \frac{K}{2}$

Step 5.3.2.1.3.1.3

Multiply $6$ by $6$ .

$y = \frac{x^{6}}{36} + \frac{x^{3}}{6} (- \frac{x}{2}) + \frac{x^{3}}{6} \cdot \frac{\arctan (x)}{2} + \frac{x^{3}}{6} \cdot \frac{K}{2} - \frac{x}{2} \cdot \frac{x^{3}}{6} - \frac{x}{2} (- \frac{x}{2}) - \frac{x}{2} \cdot \frac{\arctan (x)}{2} - \frac{x}{2} \cdot \frac{K}{2} + \frac{\arctan (x)}{2} \cdot \frac{x^{3}}{6} + \frac{\arctan (x)}{2} (- \frac{x}{2}) + \frac{\arctan (x)}{2} \cdot \frac{\arctan (x)}{2} + \frac{\arctan (x)}{2} \cdot \frac{K}{2} + \frac{K}{2} \cdot \frac{x^{3}}{6} + \frac{K}{2} (- \frac{x}{2}) + \frac{K}{2} \cdot \frac{\arctan (x)}{2} + \frac{K}{2} \cdot \frac{K}{2}$

Step 5.3.2.1.3.1.4

Rewrite using the commutative property of multiplication.

$y = \frac{x^{6}}{36} - \frac{x^{3}}{6} \cdot \frac{x}{2} + \frac{x^{3}}{6} \cdot \frac{\arctan (x)}{2} + \frac{x^{3}}{6} \cdot \frac{K}{2} - \frac{x}{2} \cdot \frac{x^{3}}{6} - \frac{x}{2} (- \frac{x}{2}) - \frac{x}{2} \cdot \frac{\arctan (x)}{2} - \frac{x}{2} \cdot \frac{K}{2} + \frac{\arctan (x)}{2} \cdot \frac{x^{3}}{6} + \frac{\arctan (x)}{2} (- \frac{x}{2}) + \frac{\arctan (x)}{2} \cdot \frac{\arctan (x)}{2} + \frac{\arctan (x)}{2} \cdot \frac{K}{2} + \frac{K}{2} \cdot \frac{x^{3}}{6} + \frac{K}{2} (- \frac{x}{2}) + \frac{K}{2} \cdot \frac{\arctan (x)}{2} + \frac{K}{2} \cdot \frac{K}{2}$

Step 5.3.2.1.3.1.5

Multiply $- \frac{x^{3}}{6} \cdot \frac{x}{2}$ .

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Step 5.3.2.1.3.1.5.1

Multiply $\frac{x}{2}$ by $\frac{x^{3}}{6}$ .

$y = \frac{x^{6}}{36} - \frac{x \cdot x^{3}}{2 \cdot 6} + \frac{x^{3}}{6} \cdot \frac{\arctan (x)}{2} + \frac{x^{3}}{6} \cdot \frac{K}{2} - \frac{x}{2} \cdot \frac{x^{3}}{6} - \frac{x}{2} (- \frac{x}{2}) - \frac{x}{2} \cdot \frac{\arctan (x)}{2} - \frac{x}{2} \cdot \frac{K}{2} + \frac{\arctan (x)}{2} \cdot \frac{x^{3}}{6} + \frac{\arctan (x)}{2} (- \frac{x}{2}) + \frac{\arctan (x)}{2} \cdot \frac{\arctan (x)}{2} + \frac{\arctan (x)}{2} \cdot \frac{K}{2} + \frac{K}{2} \cdot \frac{x^{3}}{6} + \frac{K}{2} (- \frac{x}{2}) + \frac{K}{2} \cdot \frac{\arctan (x)}{2} + \frac{K}{2} \cdot \frac{K}{2}$

Step 5.3.2.1.3.1.5.2

Multiply $x$ by $x^{3}$ by adding the exponents.

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Step 5.3.2.1.3.1.5.2.1

Multiply $x$ by $x^{3}$ .

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Step 5.3.2.1.3.1.5.2.1.1

Raise $x$ to the power of $1$ .

$y = \frac{x^{6}}{36} - \frac{x^{1} x^{3}}{2 \cdot 6} + \frac{x^{3}}{6} \cdot \frac{\arctan (x)}{2} + \frac{x^{3}}{6} \cdot \frac{K}{2} - \frac{x}{2} \cdot \frac{x^{3}}{6} - \frac{x}{2} (- \frac{x}{2}) - \frac{x}{2} \cdot \frac{\arctan (x)}{2} - \frac{x}{2} \cdot \frac{K}{2} + \frac{\arctan (x)}{2} \cdot \frac{x^{3}}{6} + \frac{\arctan (x)}{2} (- \frac{x}{2}) + \frac{\arctan (x)}{2} \cdot \frac{\arctan (x)}{2} + \frac{\arctan (x)}{2} \cdot \frac{K}{2} + \frac{K}{2} \cdot \frac{x^{3}}{6} + \frac{K}{2} (- \frac{x}{2}) + \frac{K}{2} \cdot \frac{\arctan (x)}{2} + \frac{K}{2} \cdot \frac{K}{2}$

Step 5.3.2.1.3.1.5.2.1.2

Use the power rule $a^{m} a^{n} = a^{m + n}$ to combine exponents.

$y = \frac{x^{6}}{36} - \frac{x^{1 + 3}}{2 \cdot 6} + \frac{x^{3}}{6} \cdot \frac{\arctan (x)}{2} + \frac{x^{3}}{6} \cdot \frac{K}{2} - \frac{x}{2} \cdot \frac{x^{3}}{6} - \frac{x}{2} (- \frac{x}{2}) - \frac{x}{2} \cdot \frac{\arctan (x)}{2} - \frac{x}{2} \cdot \frac{K}{2} + \frac{\arctan (x)}{2} \cdot \frac{x^{3}}{6} + \frac{\arctan (x)}{2} (- \frac{x}{2}) + \frac{\arctan (x)}{2} \cdot \frac{\arctan (x)}{2} + \frac{\arctan (x)}{2} \cdot \frac{K}{2} + \frac{K}{2} \cdot \frac{x^{3}}{6} + \frac{K}{2} (- \frac{x}{2}) + \frac{K}{2} \cdot \frac{\arctan (x)}{2} + \frac{K}{2} \cdot \frac{K}{2}$

Step 5.3.2.1.3.1.5.2.2

Add $1$ and $3$ .

$y = \frac{x^{6}}{36} - \frac{x^{4}}{2 \cdot 6} + \frac{x^{3}}{6} \cdot \frac{\arctan (x)}{2} + \frac{x^{3}}{6} \cdot \frac{K}{2} - \frac{x}{2} \cdot \frac{x^{3}}{6} - \frac{x}{2} (- \frac{x}{2}) - \frac{x}{2} \cdot \frac{\arctan (x)}{2} - \frac{x}{2} \cdot \frac{K}{2} + \frac{\arctan (x)}{2} \cdot \frac{x^{3}}{6} + \frac{\arctan (x)}{2} (- \frac{x}{2}) + \frac{\arctan (x)}{2} \cdot \frac{\arctan (x)}{2} + \frac{\arctan (x)}{2} \cdot \frac{K}{2} + \frac{K}{2} \cdot \frac{x^{3}}{6} + \frac{K}{2} (- \frac{x}{2}) + \frac{K}{2} \cdot \frac{\arctan (x)}{2} + \frac{K}{2} \cdot \frac{K}{2}$

Step 5.3.2.1.3.1.5.3

Multiply $2$ by $6$ .

$y = \frac{x^{6}}{36} - \frac{x^{4}}{12} + \frac{x^{3}}{6} \cdot \frac{\arctan (x)}{2} + \frac{x^{3}}{6} \cdot \frac{K}{2} - \frac{x}{2} \cdot \frac{x^{3}}{6} - \frac{x}{2} (- \frac{x}{2}) - \frac{x}{2} \cdot \frac{\arctan (x)}{2} - \frac{x}{2} \cdot \frac{K}{2} + \frac{\arctan (x)}{2} \cdot \frac{x^{3}}{6} + \frac{\arctan (x)}{2} (- \frac{x}{2}) + \frac{\arctan (x)}{2} \cdot \frac{\arctan (x)}{2} + \frac{\arctan (x)}{2} \cdot \frac{K}{2} + \frac{K}{2} \cdot \frac{x^{3}}{6} + \frac{K}{2} (- \frac{x}{2}) + \frac{K}{2} \cdot \frac{\arctan (x)}{2} + \frac{K}{2} \cdot \frac{K}{2}$

Step 5.3.2.1.3.1.6

Combine.

$y = \frac{x^{6}}{36} - \frac{x^{4}}{12} + \frac{x^{3} \arctan (x)}{6 \cdot 2} + \frac{x^{3}}{6} \cdot \frac{K}{2} - \frac{x}{2} \cdot \frac{x^{3}}{6} - \frac{x}{2} (- \frac{x}{2}) - \frac{x}{2} \cdot \frac{\arctan (x)}{2} - \frac{x}{2} \cdot \frac{K}{2} + \frac{\arctan (x)}{2} \cdot \frac{x^{3}}{6} + \frac{\arctan (x)}{2} (- \frac{x}{2}) + \frac{\arctan (x)}{2} \cdot \frac{\arctan (x)}{2} + \frac{\arctan (x)}{2} \cdot \frac{K}{2} + \frac{K}{2} \cdot \frac{x^{3}}{6} + \frac{K}{2} (- \frac{x}{2}) + \frac{K}{2} \cdot \frac{\arctan (x)}{2} + \frac{K}{2} \cdot \frac{K}{2}$

Step 5.3.2.1.3.1.7

Multiply $6$ by $2$ .

$y = \frac{x^{6}}{36} - \frac{x^{4}}{12} + \frac{x^{3} \arctan (x)}{12} + \frac{x^{3}}{6} \cdot \frac{K}{2} - \frac{x}{2} \cdot \frac{x^{3}}{6} - \frac{x}{2} (- \frac{x}{2}) - \frac{x}{2} \cdot \frac{\arctan (x)}{2} - \frac{x}{2} \cdot \frac{K}{2} + \frac{\arctan (x)}{2} \cdot \frac{x^{3}}{6} + \frac{\arctan (x)}{2} (- \frac{x}{2}) + \frac{\arctan (x)}{2} \cdot \frac{\arctan (x)}{2} + \frac{\arctan (x)}{2} \cdot \frac{K}{2} + \frac{K}{2} \cdot \frac{x^{3}}{6} + \frac{K}{2} (- \frac{x}{2}) + \frac{K}{2} \cdot \frac{\arctan (x)}{2} + \frac{K}{2} \cdot \frac{K}{2}$

Step 5.3.2.1.3.1.8

Combine.

$y = \frac{x^{6}}{36} - \frac{x^{4}}{12} + \frac{x^{3} \arctan (x)}{12} + \frac{x^{3} K}{6 \cdot 2} - \frac{x}{2} \cdot \frac{x^{3}}{6} - \frac{x}{2} (- \frac{x}{2}) - \frac{x}{2} \cdot \frac{\arctan (x)}{2} - \frac{x}{2} \cdot \frac{K}{2} + \frac{\arctan (x)}{2} \cdot \frac{x^{3}}{6} + \frac{\arctan (x)}{2} (- \frac{x}{2}) + \frac{\arctan (x)}{2} \cdot \frac{\arctan (x)}{2} + \frac{\arctan (x)}{2} \cdot \frac{K}{2} + \frac{K}{2} \cdot \frac{x^{3}}{6} + \frac{K}{2} (- \frac{x}{2}) + \frac{K}{2} \cdot \frac{\arctan (x)}{2} + \frac{K}{2} \cdot \frac{K}{2}$

Step 5.3.2.1.3.1.9

Multiply $6$ by $2$ .

$y = \frac{x^{6}}{36} - \frac{x^{4}}{12} + \frac{x^{3} \arctan (x)}{12} + \frac{x^{3} K}{12} - \frac{x}{2} \cdot \frac{x^{3}}{6} - \frac{x}{2} (- \frac{x}{2}) - \frac{x}{2} \cdot \frac{\arctan (x)}{2} - \frac{x}{2} \cdot \frac{K}{2} + \frac{\arctan (x)}{2} \cdot \frac{x^{3}}{6} + \frac{\arctan (x)}{2} (- \frac{x}{2}) + \frac{\arctan (x)}{2} \cdot \frac{\arctan (x)}{2} + \frac{\arctan (x)}{2} \cdot \frac{K}{2} + \frac{K}{2} \cdot \frac{x^{3}}{6} + \frac{K}{2} (- \frac{x}{2}) + \frac{K}{2} \cdot \frac{\arctan (x)}{2} + \frac{K}{2} \cdot \frac{K}{2}$

Step 5.3.2.1.3.1.10

Multiply $- \frac{x}{2} \cdot \frac{x^{3}}{6}$ .

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Step 5.3.2.1.3.1.10.1

Multiply $\frac{x^{3}}{6}$ by $\frac{x}{2}$ .

$y = \frac{x^{6}}{36} - \frac{x^{4}}{12} + \frac{x^{3} \arctan (x)}{12} + \frac{x^{3} K}{12} - \frac{x^{3} x}{6 \cdot 2} - \frac{x}{2} (- \frac{x}{2}) - \frac{x}{2} \cdot \frac{\arctan (x)}{2} - \frac{x}{2} \cdot \frac{K}{2} + \frac{\arctan (x)}{2} \cdot \frac{x^{3}}{6} + \frac{\arctan (x)}{2} (- \frac{x}{2}) + \frac{\arctan (x)}{2} \cdot \frac{\arctan (x)}{2} + \frac{\arctan (x)}{2} \cdot \frac{K}{2} + \frac{K}{2} \cdot \frac{x^{3}}{6} + \frac{K}{2} (- \frac{x}{2}) + \frac{K}{2} \cdot \frac{\arctan (x)}{2} + \frac{K}{2} \cdot \frac{K}{2}$

Step 5.3.2.1.3.1.10.2

Multiply $x^{3}$ by $x$ by adding the exponents.

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Step 5.3.2.1.3.1.10.2.1

Multiply $x^{3}$ by $x$ .

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Step 5.3.2.1.3.1.10.2.1.1

Raise $x$ to the power of $1$ .

$y = \frac{x^{6}}{36} - \frac{x^{4}}{12} + \frac{x^{3} \arctan (x)}{12} + \frac{x^{3} K}{12} - \frac{x^{3} x^{1}}{6 \cdot 2} - \frac{x}{2} (- \frac{x}{2}) - \frac{x}{2} \cdot \frac{\arctan (x)}{2} - \frac{x}{2} \cdot \frac{K}{2} + \frac{\arctan (x)}{2} \cdot \frac{x^{3}}{6} + \frac{\arctan (x)}{2} (- \frac{x}{2}) + \frac{\arctan (x)}{2} \cdot \frac{\arctan (x)}{2} + \frac{\arctan (x)}{2} \cdot \frac{K}{2} + \frac{K}{2} \cdot \frac{x^{3}}{6} + \frac{K}{2} (- \frac{x}{2}) + \frac{K}{2} \cdot \frac{\arctan (x)}{2} + \frac{K}{2} \cdot \frac{K}{2}$

Step 5.3.2.1.3.1.10.2.1.2

Use the power rule $a^{m} a^{n} = a^{m + n}$ to combine exponents.

$y = \frac{x^{6}}{36} - \frac{x^{4}}{12} + \frac{x^{3} \arctan (x)}{12} + \frac{x^{3} K}{12} - \frac{x^{3 + 1}}{6 \cdot 2} - \frac{x}{2} (- \frac{x}{2}) - \frac{x}{2} \cdot \frac{\arctan (x)}{2} - \frac{x}{2} \cdot \frac{K}{2} + \frac{\arctan (x)}{2} \cdot \frac{x^{3}}{6} + \frac{\arctan (x)}{2} (- \frac{x}{2}) + \frac{\arctan (x)}{2} \cdot \frac{\arctan (x)}{2} + \frac{\arctan (x)}{2} \cdot \frac{K}{2} + \frac{K}{2} \cdot \frac{x^{3}}{6} + \frac{K}{2} (- \frac{x}{2}) + \frac{K}{2} \cdot \frac{\arctan (x)}{2} + \frac{K}{2} \cdot \frac{K}{2}$

Step 5.3.2.1.3.1.10.2.2

Add $3$ and $1$ .

$y = \frac{x^{6}}{36} - \frac{x^{4}}{12} + \frac{x^{3} \arctan (x)}{12} + \frac{x^{3} K}{12} - \frac{x^{4}}{6 \cdot 2} - \frac{x}{2} (- \frac{x}{2}) - \frac{x}{2} \cdot \frac{\arctan (x)}{2} - \frac{x}{2} \cdot \frac{K}{2} + \frac{\arctan (x)}{2} \cdot \frac{x^{3}}{6} + \frac{\arctan (x)}{2} (- \frac{x}{2}) + \frac{\arctan (x)}{2} \cdot \frac{\arctan (x)}{2} + \frac{\arctan (x)}{2} \cdot \frac{K}{2} + \frac{K}{2} \cdot \frac{x^{3}}{6} + \frac{K}{2} (- \frac{x}{2}) + \frac{K}{2} \cdot \frac{\arctan (x)}{2} + \frac{K}{2} \cdot \frac{K}{2}$

Step 5.3.2.1.3.1.10.3

Multiply $6$ by $2$ .

$y = \frac{x^{6}}{36} - \frac{x^{4}}{12} + \frac{x^{3} \arctan (x)}{12} + \frac{x^{3} K}{12} - \frac{x^{4}}{12} - \frac{x}{2} (- \frac{x}{2}) - \frac{x}{2} \cdot \frac{\arctan (x)}{2} - \frac{x}{2} \cdot \frac{K}{2} + \frac{\arctan (x)}{2} \cdot \frac{x^{3}}{6} + \frac{\arctan (x)}{2} (- \frac{x}{2}) + \frac{\arctan (x)}{2} \cdot \frac{\arctan (x)}{2} + \frac{\arctan (x)}{2} \cdot \frac{K}{2} + \frac{K}{2} \cdot \frac{x^{3}}{6} + \frac{K}{2} (- \frac{x}{2}) + \frac{K}{2} \cdot \frac{\arctan (x)}{2} + \frac{K}{2} \cdot \frac{K}{2}$

Step 5.3.2.1.3.1.11

Multiply $- \frac{x}{2} (- \frac{x}{2})$ .

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Step 5.3.2.1.3.1.11.1

Multiply $- 1$ by $- 1$ .

$y = \frac{x^{6}}{36} - \frac{x^{4}}{12} + \frac{x^{3} \arctan (x)}{12} + \frac{x^{3} K}{12} - \frac{x^{4}}{12} + 1 \frac{x}{2} \frac{x}{2} - \frac{x}{2} \cdot \frac{\arctan (x)}{2} - \frac{x}{2} \cdot \frac{K}{2} + \frac{\arctan (x)}{2} \cdot \frac{x^{3}}{6} + \frac{\arctan (x)}{2} (- \frac{x}{2}) + \frac{\arctan (x)}{2} \cdot \frac{\arctan (x)}{2} + \frac{\arctan (x)}{2} \cdot \frac{K}{2} + \frac{K}{2} \cdot \frac{x^{3}}{6} + \frac{K}{2} (- \frac{x}{2}) + \frac{K}{2} \cdot \frac{\arctan (x)}{2} + \frac{K}{2} \cdot \frac{K}{2}$

Step 5.3.2.1.3.1.11.2

Multiply $\frac{x}{2}$ by $1$ .

$y = \frac{x^{6}}{36} - \frac{x^{4}}{12} + \frac{x^{3} \arctan (x)}{12} + \frac{x^{3} K}{12} - \frac{x^{4}}{12} + \frac{x}{2} \cdot \frac{x}{2} - \frac{x}{2} \cdot \frac{\arctan (x)}{2} - \frac{x}{2} \cdot \frac{K}{2} + \frac{\arctan (x)}{2} \cdot \frac{x^{3}}{6} + \frac{\arctan (x)}{2} (- \frac{x}{2}) + \frac{\arctan (x)}{2} \cdot \frac{\arctan (x)}{2} + \frac{\arctan (x)}{2} \cdot \frac{K}{2} + \frac{K}{2} \cdot \frac{x^{3}}{6} + \frac{K}{2} (- \frac{x}{2}) + \frac{K}{2} \cdot \frac{\arctan (x)}{2} + \frac{K}{2} \cdot \frac{K}{2}$

Step 5.3.2.1.3.1.11.3

Multiply $\frac{x}{2}$ by $\frac{x}{2}$ .

$y = \frac{x^{6}}{36} - \frac{x^{4}}{12} + \frac{x^{3} \arctan (x)}{12} + \frac{x^{3} K}{12} - \frac{x^{4}}{12} + \frac{x \cdot x}{2 \cdot 2} - \frac{x}{2} \cdot \frac{\arctan (x)}{2} - \frac{x}{2} \cdot \frac{K}{2} + \frac{\arctan (x)}{2} \cdot \frac{x^{3}}{6} + \frac{\arctan (x)}{2} (- \frac{x}{2}) + \frac{\arctan (x)}{2} \cdot \frac{\arctan (x)}{2} + \frac{\arctan (x)}{2} \cdot \frac{K}{2} + \frac{K}{2} \cdot \frac{x^{3}}{6} + \frac{K}{2} (- \frac{x}{2}) + \frac{K}{2} \cdot \frac{\arctan (x)}{2} + \frac{K}{2} \cdot \frac{K}{2}$

Step 5.3.2.1.3.1.11.4

Raise $x$ to the power of $1$ .

$y = \frac{x^{6}}{36} - \frac{x^{4}}{12} + \frac{x^{3} \arctan (x)}{12} + \frac{x^{3} K}{12} - \frac{x^{4}}{12} + \frac{x^{1} x}{2 \cdot 2} - \frac{x}{2} \cdot \frac{\arctan (x)}{2} - \frac{x}{2} \cdot \frac{K}{2} + \frac{\arctan (x)}{2} \cdot \frac{x^{3}}{6} + \frac{\arctan (x)}{2} (- \frac{x}{2}) + \frac{\arctan (x)}{2} \cdot \frac{\arctan (x)}{2} + \frac{\arctan (x)}{2} \cdot \frac{K}{2} + \frac{K}{2} \cdot \frac{x^{3}}{6} + \frac{K}{2} (- \frac{x}{2}) + \frac{K}{2} \cdot \frac{\arctan (x)}{2} + \frac{K}{2} \cdot \frac{K}{2}$

Step 5.3.2.1.3.1.11.5

Raise $x$ to the power of $1$ .

$y = \frac{x^{6}}{36} - \frac{x^{4}}{12} + \frac{x^{3} \arctan (x)}{12} + \frac{x^{3} K}{12} - \frac{x^{4}}{12} + \frac{x^{1} x^{1}}{2 \cdot 2} - \frac{x}{2} \cdot \frac{\arctan (x)}{2} - \frac{x}{2} \cdot \frac{K}{2} + \frac{\arctan (x)}{2} \cdot \frac{x^{3}}{6} + \frac{\arctan (x)}{2} (- \frac{x}{2}) + \frac{\arctan (x)}{2} \cdot \frac{\arctan (x)}{2} + \frac{\arctan (x)}{2} \cdot \frac{K}{2} + \frac{K}{2} \cdot \frac{x^{3}}{6} + \frac{K}{2} (- \frac{x}{2}) + \frac{K}{2} \cdot \frac{\arctan (x)}{2} + \frac{K}{2} \cdot \frac{K}{2}$

Step 5.3.2.1.3.1.11.6

Use the power rule $a^{m} a^{n} = a^{m + n}$ to combine exponents.

$y = \frac{x^{6}}{36} - \frac{x^{4}}{12} + \frac{x^{3} \arctan (x)}{12} + \frac{x^{3} K}{12} - \frac{x^{4}}{12} + \frac{x^{1 + 1}}{2 \cdot 2} - \frac{x}{2} \cdot \frac{\arctan (x)}{2} - \frac{x}{2} \cdot \frac{K}{2} + \frac{\arctan (x)}{2} \cdot \frac{x^{3}}{6} + \frac{\arctan (x)}{2} (- \frac{x}{2}) + \frac{\arctan (x)}{2} \cdot \frac{\arctan (x)}{2} + \frac{\arctan (x)}{2} \cdot \frac{K}{2} + \frac{K}{2} \cdot \frac{x^{3}}{6} + \frac{K}{2} (- \frac{x}{2}) + \frac{K}{2} \cdot \frac{\arctan (x)}{2} + \frac{K}{2} \cdot \frac{K}{2}$

Step 5.3.2.1.3.1.11.7

Add $1$ and $1$ .

$y = \frac{x^{6}}{36} - \frac{x^{4}}{12} + \frac{x^{3} \arctan (x)}{12} + \frac{x^{3} K}{12} - \frac{x^{4}}{12} + \frac{x^{2}}{2 \cdot 2} - \frac{x}{2} \cdot \frac{\arctan (x)}{2} - \frac{x}{2} \cdot \frac{K}{2} + \frac{\arctan (x)}{2} \cdot \frac{x^{3}}{6} + \frac{\arctan (x)}{2} (- \frac{x}{2}) + \frac{\arctan (x)}{2} \cdot \frac{\arctan (x)}{2} + \frac{\arctan (x)}{2} \cdot \frac{K}{2} + \frac{K}{2} \cdot \frac{x^{3}}{6} + \frac{K}{2} (- \frac{x}{2}) + \frac{K}{2} \cdot \frac{\arctan (x)}{2} + \frac{K}{2} \cdot \frac{K}{2}$

Step 5.3.2.1.3.1.11.8

Multiply $2$ by $2$ .

$y = \frac{x^{6}}{36} - \frac{x^{4}}{12} + \frac{x^{3} \arctan (x)}{12} + \frac{x^{3} K}{12} - \frac{x^{4}}{12} + \frac{x^{2}}{4} - \frac{x}{2} \cdot \frac{\arctan (x)}{2} - \frac{x}{2} \cdot \frac{K}{2} + \frac{\arctan (x)}{2} \cdot \frac{x^{3}}{6} + \frac{\arctan (x)}{2} (- \frac{x}{2}) + \frac{\arctan (x)}{2} \cdot \frac{\arctan (x)}{2} + \frac{\arctan (x)}{2} \cdot \frac{K}{2} + \frac{K}{2} \cdot \frac{x^{3}}{6} + \frac{K}{2} (- \frac{x}{2}) + \frac{K}{2} \cdot \frac{\arctan (x)}{2} + \frac{K}{2} \cdot \frac{K}{2}$

Step 5.3.2.1.3.1.12

Multiply $- \frac{x}{2} \cdot \frac{\arctan (x)}{2}$ .

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Step 5.3.2.1.3.1.12.1

Multiply $\frac{\arctan (x)}{2}$ by $\frac{x}{2}$ .

$y = \frac{x^{6}}{36} - \frac{x^{4}}{12} + \frac{x^{3} \arctan (x)}{12} + \frac{x^{3} K}{12} - \frac{x^{4}}{12} + \frac{x^{2}}{4} - \frac{\arctan (x) x}{2 \cdot 2} - \frac{x}{2} \cdot \frac{K}{2} + \frac{\arctan (x)}{2} \cdot \frac{x^{3}}{6} + \frac{\arctan (x)}{2} (- \frac{x}{2}) + \frac{\arctan (x)}{2} \cdot \frac{\arctan (x)}{2} + \frac{\arctan (x)}{2} \cdot \frac{K}{2} + \frac{K}{2} \cdot \frac{x^{3}}{6} + \frac{K}{2} (- \frac{x}{2}) + \frac{K}{2} \cdot \frac{\arctan (x)}{2} + \frac{K}{2} \cdot \frac{K}{2}$

Step 5.3.2.1.3.1.12.2

Multiply $2$ by $2$ .

$y = \frac{x^{6}}{36} - \frac{x^{4}}{12} + \frac{x^{3} \arctan (x)}{12} + \frac{x^{3} K}{12} - \frac{x^{4}}{12} + \frac{x^{2}}{4} - \frac{\arctan (x) x}{4} - \frac{x}{2} \cdot \frac{K}{2} + \frac{\arctan (x)}{2} \cdot \frac{x^{3}}{6} + \frac{\arctan (x)}{2} (- \frac{x}{2}) + \frac{\arctan (x)}{2} \cdot \frac{\arctan (x)}{2} + \frac{\arctan (x)}{2} \cdot \frac{K}{2} + \frac{K}{2} \cdot \frac{x^{3}}{6} + \frac{K}{2} (- \frac{x}{2}) + \frac{K}{2} \cdot \frac{\arctan (x)}{2} + \frac{K}{2} \cdot \frac{K}{2}$

Step 5.3.2.1.3.1.13

Multiply $- \frac{x}{2} \cdot \frac{K}{2}$ .

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Step 5.3.2.1.3.1.13.1

Multiply $\frac{K}{2}$ by $\frac{x}{2}$ .

$y = \frac{x^{6}}{36} - \frac{x^{4}}{12} + \frac{x^{3} \arctan (x)}{12} + \frac{x^{3} K}{12} - \frac{x^{4}}{12} + \frac{x^{2}}{4} - \frac{\arctan (x) x}{4} - \frac{K x}{2 \cdot 2} + \frac{\arctan (x)}{2} \cdot \frac{x^{3}}{6} + \frac{\arctan (x)}{2} (- \frac{x}{2}) + \frac{\arctan (x)}{2} \cdot \frac{\arctan (x)}{2} + \frac{\arctan (x)}{2} \cdot \frac{K}{2} + \frac{K}{2} \cdot \frac{x^{3}}{6} + \frac{K}{2} (- \frac{x}{2}) + \frac{K}{2} \cdot \frac{\arctan (x)}{2} + \frac{K}{2} \cdot \frac{K}{2}$

Step 5.3.2.1.3.1.13.2

Multiply $2$ by $2$ .

$y = \frac{x^{6}}{36} - \frac{x^{4}}{12} + \frac{x^{3} \arctan (x)}{12} + \frac{x^{3} K}{12} - \frac{x^{4}}{12} + \frac{x^{2}}{4} - \frac{\arctan (x) x}{4} - \frac{K x}{4} + \frac{\arctan (x)}{2} \cdot \frac{x^{3}}{6} + \frac{\arctan (x)}{2} (- \frac{x}{2}) + \frac{\arctan (x)}{2} \cdot \frac{\arctan (x)}{2} + \frac{\arctan (x)}{2} \cdot \frac{K}{2} + \frac{K}{2} \cdot \frac{x^{3}}{6} + \frac{K}{2} (- \frac{x}{2}) + \frac{K}{2} \cdot \frac{\arctan (x)}{2} + \frac{K}{2} \cdot \frac{K}{2}$

Step 5.3.2.1.3.1.14

Combine.

$y = \frac{x^{6}}{36} - \frac{x^{4}}{12} + \frac{x^{3} \arctan (x)}{12} + \frac{x^{3} K}{12} - \frac{x^{4}}{12} + \frac{x^{2}}{4} - \frac{\arctan (x) x}{4} - \frac{K x}{4} + \frac{\arctan (x) x^{3}}{2 \cdot 6} + \frac{\arctan (x)}{2} (- \frac{x}{2}) + \frac{\arctan (x)}{2} \cdot \frac{\arctan (x)}{2} + \frac{\arctan (x)}{2} \cdot \frac{K}{2} + \frac{K}{2} \cdot \frac{x^{3}}{6} + \frac{K}{2} (- \frac{x}{2}) + \frac{K}{2} \cdot \frac{\arctan (x)}{2} + \frac{K}{2} \cdot \frac{K}{2}$

Step 5.3.2.1.3.1.15

Multiply $2$ by $6$ .

$y = \frac{x^{6}}{36} - \frac{x^{4}}{12} + \frac{x^{3} \arctan (x)}{12} + \frac{x^{3} K}{12} - \frac{x^{4}}{12} + \frac{x^{2}}{4} - \frac{\arctan (x) x}{4} - \frac{K x}{4} + \frac{\arctan (x) x^{3}}{12} + \frac{\arctan (x)}{2} (- \frac{x}{2}) + \frac{\arctan (x)}{2} \cdot \frac{\arctan (x)}{2} + \frac{\arctan (x)}{2} \cdot \frac{K}{2} + \frac{K}{2} \cdot \frac{x^{3}}{6} + \frac{K}{2} (- \frac{x}{2}) + \frac{K}{2} \cdot \frac{\arctan (x)}{2} + \frac{K}{2} \cdot \frac{K}{2}$

Step 5.3.2.1.3.1.16

Rewrite using the commutative property of multiplication.

$y = \frac{x^{6}}{36} - \frac{x^{4}}{12} + \frac{x^{3} \arctan (x)}{12} + \frac{x^{3} K}{12} - \frac{x^{4}}{12} + \frac{x^{2}}{4} - \frac{\arctan (x) x}{4} - \frac{K x}{4} + \frac{\arctan (x) x^{3}}{12} - \frac{\arctan (x)}{2} \cdot \frac{x}{2} + \frac{\arctan (x)}{2} \cdot \frac{\arctan (x)}{2} + \frac{\arctan (x)}{2} \cdot \frac{K}{2} + \frac{K}{2} \cdot \frac{x^{3}}{6} + \frac{K}{2} (- \frac{x}{2}) + \frac{K}{2} \cdot \frac{\arctan (x)}{2} + \frac{K}{2} \cdot \frac{K}{2}$

Step 5.3.2.1.3.1.17

Multiply $- \frac{\arctan (x)}{2} \cdot \frac{x}{2}$ .

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Step 5.3.2.1.3.1.17.1

Multiply $\frac{x}{2}$ by $\frac{\arctan (x)}{2}$ .

$y = \frac{x^{6}}{36} - \frac{x^{4}}{12} + \frac{x^{3} \arctan (x)}{12} + \frac{x^{3} K}{12} - \frac{x^{4}}{12} + \frac{x^{2}}{4} - \frac{\arctan (x) x}{4} - \frac{K x}{4} + \frac{\arctan (x) x^{3}}{12} - \frac{x \arctan (x)}{2 \cdot 2} + \frac{\arctan (x)}{2} \cdot \frac{\arctan (x)}{2} + \frac{\arctan (x)}{2} \cdot \frac{K}{2} + \frac{K}{2} \cdot \frac{x^{3}}{6} + \frac{K}{2} (- \frac{x}{2}) + \frac{K}{2} \cdot \frac{\arctan (x)}{2} + \frac{K}{2} \cdot \frac{K}{2}$

Step 5.3.2.1.3.1.17.2

Multiply $2$ by $2$ .

$y = \frac{x^{6}}{36} - \frac{x^{4}}{12} + \frac{x^{3} \arctan (x)}{12} + \frac{x^{3} K}{12} - \frac{x^{4}}{12} + \frac{x^{2}}{4} - \frac{\arctan (x) x}{4} - \frac{K x}{4} + \frac{\arctan (x) x^{3}}{12} - \frac{x \arctan (x)}{4} + \frac{\arctan (x)}{2} \cdot \frac{\arctan (x)}{2} + \frac{\arctan (x)}{2} \cdot \frac{K}{2} + \frac{K}{2} \cdot \frac{x^{3}}{6} + \frac{K}{2} (- \frac{x}{2}) + \frac{K}{2} \cdot \frac{\arctan (x)}{2} + \frac{K}{2} \cdot \frac{K}{2}$

Step 5.3.2.1.3.1.18

Multiply $\frac{\arctan (x)}{2} \cdot \frac{\arctan (x)}{2}$ .

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Step 5.3.2.1.3.1.18.1

Multiply $\frac{\arctan (x)}{2}$ by $\frac{\arctan (x)}{2}$ .

$y = \frac{x^{6}}{36} - \frac{x^{4}}{12} + \frac{x^{3} \arctan (x)}{12} + \frac{x^{3} K}{12} - \frac{x^{4}}{12} + \frac{x^{2}}{4} - \frac{\arctan (x) x}{4} - \frac{K x}{4} + \frac{\arctan (x) x^{3}}{12} - \frac{x \arctan (x)}{4} + \frac{\arctan (x) \arctan (x)}{2 \cdot 2} + \frac{\arctan (x)}{2} \cdot \frac{K}{2} + \frac{K}{2} \cdot \frac{x^{3}}{6} + \frac{K}{2} (- \frac{x}{2}) + \frac{K}{2} \cdot \frac{\arctan (x)}{2} + \frac{K}{2} \cdot \frac{K}{2}$

Step 5.3.2.1.3.1.18.2

Raise $\arctan (x)$ to the power of $1$ .

$y = \frac{x^{6}}{36} - \frac{x^{4}}{12} + \frac{x^{3} \arctan (x)}{12} + \frac{x^{3} K}{12} - \frac{x^{4}}{12} + \frac{x^{2}}{4} - \frac{\arctan (x) x}{4} - \frac{K x}{4} + \frac{\arctan (x) x^{3}}{12} - \frac{x \arctan (x)}{4} + \frac{{\arctan (x)}^{1} \arctan (x)}{2 \cdot 2} + \frac{\arctan (x)}{2} \cdot \frac{K}{2} + \frac{K}{2} \cdot \frac{x^{3}}{6} + \frac{K}{2} (- \frac{x}{2}) + \frac{K}{2} \cdot \frac{\arctan (x)}{2} + \frac{K}{2} \cdot \frac{K}{2}$

Step 5.3.2.1.3.1.18.3

Raise $\arctan (x)$ to the power of $1$ .

$y = \frac{x^{6}}{36} - \frac{x^{4}}{12} + \frac{x^{3} \arctan (x)}{12} + \frac{x^{3} K}{12} - \frac{x^{4}}{12} + \frac{x^{2}}{4} - \frac{\arctan (x) x}{4} - \frac{K x}{4} + \frac{\arctan (x) x^{3}}{12} - \frac{x \arctan (x)}{4} + \frac{{\arctan (x)}^{1} {\arctan (x)}^{1}}{2 \cdot 2} + \frac{\arctan (x)}{2} \cdot \frac{K}{2} + \frac{K}{2} \cdot \frac{x^{3}}{6} + \frac{K}{2} (- \frac{x}{2}) + \frac{K}{2} \cdot \frac{\arctan (x)}{2} + \frac{K}{2} \cdot \frac{K}{2}$

Step 5.3.2.1.3.1.18.4

Use the power rule $a^{m} a^{n} = a^{m + n}$ to combine exponents.

$y = \frac{x^{6}}{36} - \frac{x^{4}}{12} + \frac{x^{3} \arctan (x)}{12} + \frac{x^{3} K}{12} - \frac{x^{4}}{12} + \frac{x^{2}}{4} - \frac{\arctan (x) x}{4} - \frac{K x}{4} + \frac{\arctan (x) x^{3}}{12} - \frac{x \arctan (x)}{4} + \frac{{\arctan (x)}^{1 + 1}}{2 \cdot 2} + \frac{\arctan (x)}{2} \cdot \frac{K}{2} + \frac{K}{2} \cdot \frac{x^{3}}{6} + \frac{K}{2} (- \frac{x}{2}) + \frac{K}{2} \cdot \frac{\arctan (x)}{2} + \frac{K}{2} \cdot \frac{K}{2}$

Step 5.3.2.1.3.1.18.5

Add $1$ and $1$ .

$y = \frac{x^{6}}{36} - \frac{x^{4}}{12} + \frac{x^{3} \arctan (x)}{12} + \frac{x^{3} K}{12} - \frac{x^{4}}{12} + \frac{x^{2}}{4} - \frac{\arctan (x) x}{4} - \frac{K x}{4} + \frac{\arctan (x) x^{3}}{12} - \frac{x \arctan (x)}{4} + \frac{{\arctan (x)}^{2}}{2 \cdot 2} + \frac{\arctan (x)}{2} \cdot \frac{K}{2} + \frac{K}{2} \cdot \frac{x^{3}}{6} + \frac{K}{2} (- \frac{x}{2}) + \frac{K}{2} \cdot \frac{\arctan (x)}{2} + \frac{K}{2} \cdot \frac{K}{2}$

Step 5.3.2.1.3.1.18.6

Multiply $2$ by $2$ .

$y = \frac{x^{6}}{36} - \frac{x^{4}}{12} + \frac{x^{3} \arctan (x)}{12} + \frac{x^{3} K}{12} - \frac{x^{4}}{12} + \frac{x^{2}}{4} - \frac{\arctan (x) x}{4} - \frac{K x}{4} + \frac{\arctan (x) x^{3}}{12} - \frac{x \arctan (x)}{4} + \frac{{\arctan (x)}^{2}}{4} + \frac{\arctan (x)}{2} \cdot \frac{K}{2} + \frac{K}{2} \cdot \frac{x^{3}}{6} + \frac{K}{2} (- \frac{x}{2}) + \frac{K}{2} \cdot \frac{\arctan (x)}{2} + \frac{K}{2} \cdot \frac{K}{2}$

Step 5.3.2.1.3.1.19

Multiply $\frac{\arctan (x)}{2} \cdot \frac{K}{2}$ .

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Step 5.3.2.1.3.1.19.1

Multiply $\frac{\arctan (x)}{2}$ by $\frac{K}{2}$ .

$y = \frac{x^{6}}{36} - \frac{x^{4}}{12} + \frac{x^{3} \arctan (x)}{12} + \frac{x^{3} K}{12} - \frac{x^{4}}{12} + \frac{x^{2}}{4} - \frac{\arctan (x) x}{4} - \frac{K x}{4} + \frac{\arctan (x) x^{3}}{12} - \frac{x \arctan (x)}{4} + \frac{{\arctan (x)}^{2}}{4} + \frac{\arctan (x) K}{2 \cdot 2} + \frac{K}{2} \cdot \frac{x^{3}}{6} + \frac{K}{2} (- \frac{x}{2}) + \frac{K}{2} \cdot \frac{\arctan (x)}{2} + \frac{K}{2} \cdot \frac{K}{2}$

Step 5.3.2.1.3.1.19.2

Multiply $2$ by $2$ .

$y = \frac{x^{6}}{36} - \frac{x^{4}}{12} + \frac{x^{3} \arctan (x)}{12} + \frac{x^{3} K}{12} - \frac{x^{4}}{12} + \frac{x^{2}}{4} - \frac{\arctan (x) x}{4} - \frac{K x}{4} + \frac{\arctan (x) x^{3}}{12} - \frac{x \arctan (x)}{4} + \frac{{\arctan (x)}^{2}}{4} + \frac{\arctan (x) K}{4} + \frac{K}{2} \cdot \frac{x^{3}}{6} + \frac{K}{2} (- \frac{x}{2}) + \frac{K}{2} \cdot \frac{\arctan (x)}{2} + \frac{K}{2} \cdot \frac{K}{2}$

Step 5.3.2.1.3.1.20

Combine.

$y = \frac{x^{6}}{36} - \frac{x^{4}}{12} + \frac{x^{3} \arctan (x)}{12} + \frac{x^{3} K}{12} - \frac{x^{4}}{12} + \frac{x^{2}}{4} - \frac{\arctan (x) x}{4} - \frac{K x}{4} + \frac{\arctan (x) x^{3}}{12} - \frac{x \arctan (x)}{4} + \frac{{\arctan (x)}^{2}}{4} + \frac{\arctan (x) K}{4} + \frac{K x^{3}}{2 \cdot 6} + \frac{K}{2} (- \frac{x}{2}) + \frac{K}{2} \cdot \frac{\arctan (x)}{2} + \frac{K}{2} \cdot \frac{K}{2}$

Step 5.3.2.1.3.1.21

Multiply $2$ by $6$ .

$y = \frac{x^{6}}{36} - \frac{x^{4}}{12} + \frac{x^{3} \arctan (x)}{12} + \frac{x^{3} K}{12} - \frac{x^{4}}{12} + \frac{x^{2}}{4} - \frac{\arctan (x) x}{4} - \frac{K x}{4} + \frac{\arctan (x) x^{3}}{12} - \frac{x \arctan (x)}{4} + \frac{{\arctan (x)}^{2}}{4} + \frac{\arctan (x) K}{4} + \frac{K x^{3}}{12} + \frac{K}{2} (- \frac{x}{2}) + \frac{K}{2} \cdot \frac{\arctan (x)}{2} + \frac{K}{2} \cdot \frac{K}{2}$

Step 5.3.2.1.3.1.22

Rewrite using the commutative property of multiplication.

$y = \frac{x^{6}}{36} - \frac{x^{4}}{12} + \frac{x^{3} \arctan (x)}{12} + \frac{x^{3} K}{12} - \frac{x^{4}}{12} + \frac{x^{2}}{4} - \frac{\arctan (x) x}{4} - \frac{K x}{4} + \frac{\arctan (x) x^{3}}{12} - \frac{x \arctan (x)}{4} + \frac{{\arctan (x)}^{2}}{4} + \frac{\arctan (x) K}{4} + \frac{K x^{3}}{12} - \frac{K}{2} \cdot \frac{x}{2} + \frac{K}{2} \cdot \frac{\arctan (x)}{2} + \frac{K}{2} \cdot \frac{K}{2}$

Step 5.3.2.1.3.1.23

Multiply $- \frac{K}{2} \cdot \frac{x}{2}$ .

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Step 5.3.2.1.3.1.23.1

Multiply $\frac{x}{2}$ by $\frac{K}{2}$ .

$y = \frac{x^{6}}{36} - \frac{x^{4}}{12} + \frac{x^{3} \arctan (x)}{12} + \frac{x^{3} K}{12} - \frac{x^{4}}{12} + \frac{x^{2}}{4} - \frac{\arctan (x) x}{4} - \frac{K x}{4} + \frac{\arctan (x) x^{3}}{12} - \frac{x \arctan (x)}{4} + \frac{{\arctan (x)}^{2}}{4} + \frac{\arctan (x) K}{4} + \frac{K x^{3}}{12} - \frac{x K}{2 \cdot 2} + \frac{K}{2} \cdot \frac{\arctan (x)}{2} + \frac{K}{2} \cdot \frac{K}{2}$

Step 5.3.2.1.3.1.23.2

Multiply $2$ by $2$ .

$y = \frac{x^{6}}{36} - \frac{x^{4}}{12} + \frac{x^{3} \arctan (x)}{12} + \frac{x^{3} K}{12} - \frac{x^{4}}{12} + \frac{x^{2}}{4} - \frac{\arctan (x) x}{4} - \frac{K x}{4} + \frac{\arctan (x) x^{3}}{12} - \frac{x \arctan (x)}{4} + \frac{{\arctan (x)}^{2}}{4} + \frac{\arctan (x) K}{4} + \frac{K x^{3}}{12} - \frac{x K}{4} + \frac{K}{2} \cdot \frac{\arctan (x)}{2} + \frac{K}{2} \cdot \frac{K}{2}$

Step 5.3.2.1.3.1.24

Multiply $\frac{K}{2} \cdot \frac{\arctan (x)}{2}$ .

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Step 5.3.2.1.3.1.24.1

Multiply $\frac{K}{2}$ by $\frac{\arctan (x)}{2}$ .

$y = \frac{x^{6}}{36} - \frac{x^{4}}{12} + \frac{x^{3} \arctan (x)}{12} + \frac{x^{3} K}{12} - \frac{x^{4}}{12} + \frac{x^{2}}{4} - \frac{\arctan (x) x}{4} - \frac{K x}{4} + \frac{\arctan (x) x^{3}}{12} - \frac{x \arctan (x)}{4} + \frac{{\arctan (x)}^{2}}{4} + \frac{\arctan (x) K}{4} + \frac{K x^{3}}{12} - \frac{x K}{4} + \frac{K \arctan (x)}{2 \cdot 2} + \frac{K}{2} \cdot \frac{K}{2}$

Step 5.3.2.1.3.1.24.2

Multiply $2$ by $2$ .

$y = \frac{x^{6}}{36} - \frac{x^{4}}{12} + \frac{x^{3} \arctan (x)}{12} + \frac{x^{3} K}{12} - \frac{x^{4}}{12} + \frac{x^{2}}{4} - \frac{\arctan (x) x}{4} - \frac{K x}{4} + \frac{\arctan (x) x^{3}}{12} - \frac{x \arctan (x)}{4} + \frac{{\arctan (x)}^{2}}{4} + \frac{\arctan (x) K}{4} + \frac{K x^{3}}{12} - \frac{x K}{4} + \frac{K \arctan (x)}{4} + \frac{K}{2} \cdot \frac{K}{2}$

Step 5.3.2.1.3.1.25

Multiply $\frac{K}{2} \cdot \frac{K}{2}$ .

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Step 5.3.2.1.3.1.25.1

Multiply $\frac{K}{2}$ by $\frac{K}{2}$ .

$y = \frac{x^{6}}{36} - \frac{x^{4}}{12} + \frac{x^{3} \arctan (x)}{12} + \frac{x^{3} K}{12} - \frac{x^{4}}{12} + \frac{x^{2}}{4} - \frac{\arctan (x) x}{4} - \frac{K x}{4} + \frac{\arctan (x) x^{3}}{12} - \frac{x \arctan (x)}{4} + \frac{{\arctan (x)}^{2}}{4} + \frac{\arctan (x) K}{4} + \frac{K x^{3}}{12} - \frac{x K}{4} + \frac{K \arctan (x)}{4} + \frac{K \cdot K}{2 \cdot 2}$

Step 5.3.2.1.3.1.25.2

Raise $K$ to the power of $1$ .

$y = \frac{x^{6}}{36} - \frac{x^{4}}{12} + \frac{x^{3} \arctan (x)}{12} + \frac{x^{3} K}{12} - \frac{x^{4}}{12} + \frac{x^{2}}{4} - \frac{\arctan (x) x}{4} - \frac{K x}{4} + \frac{\arctan (x) x^{3}}{12} - \frac{x \arctan (x)}{4} + \frac{{\arctan (x)}^{2}}{4} + \frac{\arctan (x) K}{4} + \frac{K x^{3}}{12} - \frac{x K}{4} + \frac{K \arctan (x)}{4} + \frac{K^{1} K}{2 \cdot 2}$

Step 5.3.2.1.3.1.25.3

Raise $K$ to the power of $1$ .

$y = \frac{x^{6}}{36} - \frac{x^{4}}{12} + \frac{x^{3} \arctan (x)}{12} + \frac{x^{3} K}{12} - \frac{x^{4}}{12} + \frac{x^{2}}{4} - \frac{\arctan (x) x}{4} - \frac{K x}{4} + \frac{\arctan (x) x^{3}}{12} - \frac{x \arctan (x)}{4} + \frac{{\arctan (x)}^{2}}{4} + \frac{\arctan (x) K}{4} + \frac{K x^{3}}{12} - \frac{x K}{4} + \frac{K \arctan (x)}{4} + \frac{K^{1} K^{1}}{2 \cdot 2}$

Step 5.3.2.1.3.1.25.4

Use the power rule $a^{m} a^{n} = a^{m + n}$ to combine exponents.

$y = \frac{x^{6}}{36} - \frac{x^{4}}{12} + \frac{x^{3} \arctan (x)}{12} + \frac{x^{3} K}{12} - \frac{x^{4}}{12} + \frac{x^{2}}{4} - \frac{\arctan (x) x}{4} - \frac{K x}{4} + \frac{\arctan (x) x^{3}}{12} - \frac{x \arctan (x)}{4} + \frac{{\arctan (x)}^{2}}{4} + \frac{\arctan (x) K}{4} + \frac{K x^{3}}{12} - \frac{x K}{4} + \frac{K \arctan (x)}{4} + \frac{K^{1 + 1}}{2 \cdot 2}$

Step 5.3.2.1.3.1.25.5

Add $1$ and $1$ .

$y = \frac{x^{6}}{36} - \frac{x^{4}}{12} + \frac{x^{3} \arctan (x)}{12} + \frac{x^{3} K}{12} - \frac{x^{4}}{12} + \frac{x^{2}}{4} - \frac{\arctan (x) x}{4} - \frac{K x}{4} + \frac{\arctan (x) x^{3}}{12} - \frac{x \arctan (x)}{4} + \frac{{\arctan (x)}^{2}}{4} + \frac{\arctan (x) K}{4} + \frac{K x^{3}}{12} - \frac{x K}{4} + \frac{K \arctan (x)}{4} + \frac{K^{2}}{2 \cdot 2}$

Step 5.3.2.1.3.1.25.6

Multiply $2$ by $2$ .

$y = \frac{x^{6}}{36} - \frac{x^{4}}{12} + \frac{x^{3} \arctan (x)}{12} + \frac{x^{3} K}{12} - \frac{x^{4}}{12} + \frac{x^{2}}{4} - \frac{\arctan (x) x}{4} - \frac{K x}{4} + \frac{\arctan (x) x^{3}}{12} - \frac{x \arctan (x)}{4} + \frac{{\arctan (x)}^{2}}{4} + \frac{\arctan (x) K}{4} + \frac{K x^{3}}{12} - \frac{x K}{4} + \frac{K \arctan (x)}{4} + \frac{K^{2}}{4}$

Step 5.3.2.1.3.2

Simplify terms.

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Step 5.3.2.1.3.2.1

Combine the numerators over the common denominator.

$y = \frac{x^{6}}{36} + \frac{- x^{4} + x^{3} \arctan (x) + x^{3} K - x^{4} + \arctan (x) x^{3} + K x^{3}}{12} + \frac{x^{2} - \arctan (x) x - K x - x \arctan (x) + {\arctan (x)}^{2} + \arctan (x) K - x K + K \arctan (x) + K^{2}}{4}$

Step 5.3.2.1.3.2.2

Subtract $x^{4}$ from $- x^{4}$ .

$y = \frac{x^{6}}{36} + \frac{- 2 x^{4} + x^{3} \arctan (x) + x^{3} K + \arctan (x) x^{3} + K x^{3}}{12} + \frac{x^{2} - \arctan (x) x - K x - x \arctan (x) + {\arctan (x)}^{2} + \arctan (x) K - x K + K \arctan (x) + K^{2}}{4}$

Step 5.3.2.1.4

Add $x^{3} \arctan (x)$ and $\arctan (x) x^{3}$ .

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Step 5.3.2.1.4.1

Reorder $\arctan (x)$ and $x^{3}$ .

$y = \frac{x^{6}}{36} + \frac{- 2 x^{4} + x^{3} \arctan (x) + x^{3} \arctan (x) + x^{3} K + K x^{3}}{12} + \frac{x^{2} - \arctan (x) x - K x - x \arctan (x) + {\arctan (x)}^{2} + \arctan (x) K - x K + K \arctan (x) + K^{2}}{4}$

Step 5.3.2.1.4.2

Add $x^{3} \arctan (x)$ and $x^{3} \arctan (x)$ .

$y = \frac{x^{6}}{36} + \frac{- 2 x^{4} + 2 x^{3} \arctan (x) + x^{3} K + K x^{3}}{12} + \frac{x^{2} - \arctan (x) x - K x - x \arctan (x) + {\arctan (x)}^{2} + \arctan (x) K - x K + K \arctan (x) + K^{2}}{4}$

Step 5.3.2.1.5

Add $x^{3} K$ and $K x^{3}$ .

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Step 5.3.2.1.5.1

Reorder $x^{3}$ and $K$ .

$y = \frac{x^{6}}{36} + \frac{- 2 x^{4} + 2 x^{3} \arctan (x) + K x^{3} + K x^{3}}{12} + \frac{x^{2} - \arctan (x) x - K x - x \arctan (x) + {\arctan (x)}^{2} + \arctan (x) K - x K + K \arctan (x) + K^{2}}{4}$

Step 5.3.2.1.5.2

Add $K x^{3}$ and $K x^{3}$ .

$y = \frac{x^{6}}{36} + \frac{- 2 x^{4} + 2 x^{3} \arctan (x) + 2 K x^{3}}{12} + \frac{x^{2} - \arctan (x) x - K x - x \arctan (x) + {\arctan (x)}^{2} + \arctan (x) K - x K + K \arctan (x) + K^{2}}{4}$

Step 5.3.2.1.6

Subtract $x \arctan (x)$ from $- \arctan (x) x$ .

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Step 5.3.2.1.6.1

Move $\arctan (x)$ .

$y = \frac{x^{6}}{36} + \frac{- 2 x^{4} + 2 x^{3} \arctan (x) + 2 K x^{3}}{12} + \frac{x^{2} - x \arctan (x) - x \arctan (x) - K x + {\arctan (x)}^{2} + \arctan (x) K - x K + K \arctan (x) + K^{2}}{4}$

Step 5.3.2.1.6.2

Subtract $x \arctan (x)$ from $- x \arctan (x)$ .

$y = \frac{x^{6}}{36} + \frac{- 2 x^{4} + 2 x^{3} \arctan (x) + 2 K x^{3}}{12} + \frac{x^{2} - 2 x \arctan (x) - K x + {\arctan (x)}^{2} + \arctan (x) K - x K + K \arctan (x) + K^{2}}{4}$

Step 5.3.2.1.7

Subtract $x K$ from $- K x$ .

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Step 5.3.2.1.7.1

Move $x$ .

$y = \frac{x^{6}}{36} + \frac{- 2 x^{4} + 2 x^{3} \arctan (x) + 2 K x^{3}}{12} + \frac{x^{2} - 2 x \arctan (x) + {\arctan (x)}^{2} + \arctan (x) K - K x - K x + K \arctan (x) + K^{2}}{4}$

Step 5.3.2.1.7.2

Subtract $K x$ from $- K x$ .

$y = \frac{x^{6}}{36} + \frac{- 2 x^{4} + 2 x^{3} \arctan (x) + 2 K x^{3}}{12} + \frac{x^{2} - 2 x \arctan (x) + {\arctan (x)}^{2} + \arctan (x) K - 2 K x + K \arctan (x) + K^{2}}{4}$

Step 5.3.2.1.8

Add $\arctan (x) K$ and $K \arctan (x)$ .

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Step 5.3.2.1.8.1

Reorder $\arctan (x)$ and $K$ .

$y = \frac{x^{6}}{36} + \frac{- 2 x^{4} + 2 x^{3} \arctan (x) + 2 K x^{3}}{12} + \frac{x^{2} - 2 x \arctan (x) + {\arctan (x)}^{2} + K \arctan (x) + K \arctan (x) - 2 K x + K^{2}}{4}$

Step 5.3.2.1.8.2

Add $K \arctan (x)$ and $K \arctan (x)$ .

$y = \frac{x^{6}}{36} + \frac{- 2 x^{4} + 2 x^{3} \arctan (x) + 2 K x^{3}}{12} + \frac{x^{2} - 2 x \arctan (x) + {\arctan (x)}^{2} + 2 K \arctan (x) - 2 K x + K^{2}}{4}$

Step 5.3.2.1.9

Simplify each term.

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Step 5.3.2.1.9.1

Factor $2 x^{3}$ out of $- 2 x^{4} + 2 x^{3} \arctan (x) + 2 K x^{3}$ .

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Step 5.3.2.1.9.1.1

Factor $2 x^{3}$ out of $- 2 x^{4}$ .

$y = \frac{x^{6}}{36} + \frac{2 x^{3} (- x) + 2 x^{3} \arctan (x) + 2 K x^{3}}{12} + \frac{x^{2} - 2 x \arctan (x) + {\arctan (x)}^{2} + 2 K \arctan (x) - 2 K x + K^{2}}{4}$

Step 5.3.2.1.9.1.2

Factor $2 x^{3}$ out of $2 x^{3} \arctan (x)$ .

$y = \frac{x^{6}}{36} + \frac{2 x^{3} (- x) + 2 x^{3} (\arctan (x)) + 2 K x^{3}}{12} + \frac{x^{2} - 2 x \arctan (x) + {\arctan (x)}^{2} + 2 K \arctan (x) - 2 K x + K^{2}}{4}$

Step 5.3.2.1.9.1.3

Factor $2 x^{3}$ out of $2 K x^{3}$ .

$y = \frac{x^{6}}{36} + \frac{2 x^{3} (- x) + 2 x^{3} (\arctan (x)) + 2 x^{3} K}{12} + \frac{x^{2} - 2 x \arctan (x) + {\arctan (x)}^{2} + 2 K \arctan (x) - 2 K x + K^{2}}{4}$

Step 5.3.2.1.9.1.4

Factor $2 x^{3}$ out of $2 x^{3} (- x) + 2 x^{3} (\arctan (x))$ .

$y = \frac{x^{6}}{36} + \frac{2 x^{3} (- x + \arctan (x)) + 2 x^{3} K}{12} + \frac{x^{2} - 2 x \arctan (x) + {\arctan (x)}^{2} + 2 K \arctan (x) - 2 K x + K^{2}}{4}$

Step 5.3.2.1.9.1.5

Factor $2 x^{3}$ out of $2 x^{3} (- x + \arctan (x)) + 2 x^{3} K$ .

$y = \frac{x^{6}}{36} + \frac{2 x^{3} (- x + \arctan (x) + K)}{12} + \frac{x^{2} - 2 x \arctan (x) + {\arctan (x)}^{2} + 2 K \arctan (x) - 2 K x + K^{2}}{4}$

Step 5.3.2.1.9.2

Cancel the common factor of $2$ and $12$ .

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Step 5.3.2.1.9.2.1

Factor $2$ out of $2 x^{3} (- x + \arctan (x) + K)$ .

$y = \frac{x^{6}}{36} + \frac{2 (x^{3} (- x + \arctan (x) + K))}{12} + \frac{x^{2} - 2 x \arctan (x) + {\arctan (x)}^{2} + 2 K \arctan (x) - 2 K x + K^{2}}{4}$

Step 5.3.2.1.9.2.2

Cancel the common factors.

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Step 5.3.2.1.9.2.2.1

Factor $2$ out of $12$ .

$y = \frac{x^{6}}{36} + \frac{2 (x^{3} (- x + \arctan (x) + K))}{2 \cdot 6} + \frac{x^{2} - 2 x \arctan (x) + {\arctan (x)}^{2} + 2 K \arctan (x) - 2 K x + K^{2}}{4}$

Step 5.3.2.1.9.2.2.2

Cancel the common factor.

$y = \frac{x^{6}}{36} + \frac{2 (x^{3} (- x + \arctan (x) + K))}{2 \cdot 6} + \frac{x^{2} - 2 x \arctan (x) + {\arctan (x)}^{2} + 2 K \arctan (x) - 2 K x + K^{2}}{4}$

Step 5.3.2.1.9.2.2.3

Rewrite the expression.

$y = \frac{x^{6}}{36} + \frac{x^{3} (- x + \arctan (x) + K)}{6} + \frac{x^{2} - 2 x \arctan (x) + {\arctan (x)}^{2} + 2 K \arctan (x) - 2 K x + K^{2}}{4}$

Step 5.3.2.1.9.3

Split the fraction $\frac{x^{2} - 2 x \arctan (x) + {\arctan (x)}^{2} + 2 K \arctan (x) - 2 K x + K^{2}}{4}$ into two fractions.

$y = \frac{x^{6}}{36} + \frac{x^{3} (- x + \arctan (x) + K)}{6} + \frac{x^{2} - 2 x \arctan (x) + {\arctan (x)}^{2} + 2 K \arctan (x) - 2 K x}{4} + \frac{K^{2}}{4}$

Step 5.3.2.1.9.4

Simplify each term.

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Step 5.3.2.1.9.4.1

Split the fraction $\frac{x^{2} - 2 x \arctan (x) + {\arctan (x)}^{2} + 2 K \arctan (x) - 2 K x}{4}$ into two fractions.

$y = \frac{x^{6}}{36} + \frac{x^{3} (- x + \arctan (x) + K)}{6} + \frac{x^{2} - 2 x \arctan (x) + {\arctan (x)}^{2} + 2 K \arctan (x)}{4} + \frac{- 2 K x}{4} + \frac{K^{2}}{4}$

Step 5.3.2.1.9.4.2

Simplify each term.

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Step 5.3.2.1.9.4.2.1

Split the fraction $\frac{x^{2} - 2 x \arctan (x) + {\arctan (x)}^{2} + 2 K \arctan (x)}{4}$ into two fractions.

$y = \frac{x^{6}}{36} + \frac{x^{3} (- x + \arctan (x) + K)}{6} + \frac{x^{2} - 2 x \arctan (x) + {\arctan (x)}^{2}}{4} + \frac{2 K \arctan (x)}{4} + \frac{- 2 K x}{4} + \frac{K^{2}}{4}$

Step 5.3.2.1.9.4.2.2

Simplify each term.

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Step 5.3.2.1.9.4.2.2.1

Factor using the perfect square rule.

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Step 5.3.2.1.9.4.2.2.1.1

Check that the middle term is two times the product of the numbers being squared in the first term and third term.

$2 x \arctan (x) = 2 \cdot x \cdot \arctan (x)$

Step 5.3.2.1.9.4.2.2.1.2

Rewrite the polynomial.

$y = \frac{x^{6}}{36} + \frac{x^{3} (- x + \arctan (x) + K)}{6} + \frac{x^{2} - 2 \cdot x \cdot \arctan (x) + {\arctan (x)}^{2}}{4} + \frac{2 K \arctan (x)}{4} + \frac{- 2 K x}{4} + \frac{K^{2}}{4}$

Step 5.3.2.1.9.4.2.2.1.3

Factor using the perfect square trinomial rule $a^{2} - 2 a b + b^{2} = {(a - b)}^{2}$ , where $a = x$ and $b = \arctan (x)$ .

$y = \frac{x^{6}}{36} + \frac{x^{3} (- x + \arctan (x) + K)}{6} + \frac{{(x - \arctan (x))}^{2}}{4} + \frac{2 K \arctan (x)}{4} + \frac{- 2 K x}{4} + \frac{K^{2}}{4}$

Step 5.3.2.1.9.4.2.2.2

Cancel the common factor of $2$ and $4$ .

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Step 5.3.2.1.9.4.2.2.2.1

Factor $2$ out of $2 K \arctan (x)$ .

$y = \frac{x^{6}}{36} + \frac{x^{3} (- x + \arctan (x) + K)}{6} + \frac{{(x - \arctan (x))}^{2}}{4} + \frac{2 (K \arctan (x))}{4} + \frac{- 2 K x}{4} + \frac{K^{2}}{4}$

Step 5.3.2.1.9.4.2.2.2.2

Cancel the common factors.

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Step 5.3.2.1.9.4.2.2.2.2.1

Factor $2$ out of $4$ .

$y = \frac{x^{6}}{36} + \frac{x^{3} (- x + \arctan (x) + K)}{6} + \frac{{(x - \arctan (x))}^{2}}{4} + \frac{2 (K \arctan (x))}{2 \cdot 2} + \frac{- 2 K x}{4} + \frac{K^{2}}{4}$

Step 5.3.2.1.9.4.2.2.2.2.2

Cancel the common factor.

$y = \frac{x^{6}}{36} + \frac{x^{3} (- x + \arctan (x) + K)}{6} + \frac{{(x - \arctan (x))}^{2}}{4} + \frac{2 (K \arctan (x))}{2 \cdot 2} + \frac{- 2 K x}{4} + \frac{K^{2}}{4}$

Step 5.3.2.1.9.4.2.2.2.2.3

Rewrite the expression.

$y = \frac{x^{6}}{36} + \frac{x^{3} (- x + \arctan (x) + K)}{6} + \frac{{(x - \arctan (x))}^{2}}{4} + \frac{K \arctan (x)}{2} + \frac{- 2 K x}{4} + \frac{K^{2}}{4}$

Step 5.3.2.1.9.4.2.3

Cancel the common factor of $- 2$ and $4$ .

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Step 5.3.2.1.9.4.2.3.1

Factor $2$ out of $- 2 K x$ .

$y = \frac{x^{6}}{36} + \frac{x^{3} (- x + \arctan (x) + K)}{6} + \frac{{(x - \arctan (x))}^{2}}{4} + \frac{K \arctan (x)}{2} + \frac{2 (- K x)}{4} + \frac{K^{2}}{4}$

Step 5.3.2.1.9.4.2.3.2

Cancel the common factors.

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Step 5.3.2.1.9.4.2.3.2.1

Factor $2$ out of $4$ .

$y = \frac{x^{6}}{36} + \frac{x^{3} (- x + \arctan (x) + K)}{6} + \frac{{(x - \arctan (x))}^{2}}{4} + \frac{K \arctan (x)}{2} + \frac{2 (- K x)}{2 (2)} + \frac{K^{2}}{4}$

Step 5.3.2.1.9.4.2.3.2.2

Cancel the common factor.

$y = \frac{x^{6}}{36} + \frac{x^{3} (- x + \arctan (x) + K)}{6} + \frac{{(x - \arctan (x))}^{2}}{4} + \frac{K \arctan (x)}{2} + \frac{2 (- K x)}{2 \cdot 2} + \frac{K^{2}}{4}$

Step 5.3.2.1.9.4.2.3.2.3

Rewrite the expression.

$y = \frac{x^{6}}{36} + \frac{x^{3} (- x + \arctan (x) + K)}{6} + \frac{{(x - \arctan (x))}^{2}}{4} + \frac{K \arctan (x)}{2} + \frac{- K x}{2} + \frac{K^{2}}{4}$

Step 5.3.2.1.9.4.2.4

Move the negative in front of the fraction.

$y = \frac{x^{6}}{36} + \frac{x^{3} (- x + \arctan (x) + K)}{6} + \frac{{(x - \arctan (x))}^{2}}{4} + \frac{K \arctan (x)}{2} - \frac{K x}{2} + \frac{K^{2}}{4}$

Step 5.4

Simplify $\frac{x^{6}}{36} + \frac{x^{3} (- x + \arctan (x) + K)}{6} + \frac{{(x - \arctan (x))}^{2}}{4} + \frac{K \arctan (x)}{2} - \frac{K x}{2} + \frac{K^{2}}{4}$ .

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Step 5.4.1

Move $\arctan (x)$ .

$y = \frac{x^{6}}{36} + \frac{x^{3} (- x + K + \arctan (x))}{6} + \frac{{(x - \arctan (x))}^{2}}{4} + \frac{K \arctan (x)}{2} - \frac{K x}{2} + \frac{K^{2}}{4}$

Step 5.4.2

Move $\frac{{(x - \arctan (x))}^{2}}{4}$ .

$y = \frac{x^{6}}{36} + \frac{x^{3} (- x + K + \arctan (x))}{6} + \frac{K \arctan (x)}{2} - \frac{K x}{2} + \frac{K^{2}}{4} + \frac{{(x - \arctan (x))}^{2}}{4}$

Step 5.4.3

Move $\frac{K \arctan (x)}{2}$ .

$y = \frac{x^{6}}{36} + \frac{x^{3} (- x + K + \arctan (x))}{6} - \frac{K x}{2} + \frac{K^{2}}{4} + \frac{K \arctan (x)}{2} + \frac{{(x - \arctan (x))}^{2}}{4}$

Step 5.4.4

Move $\frac{x^{3} (- x + K + \arctan (x))}{6}$ .

$y = \frac{x^{6}}{36} - \frac{K x}{2} + \frac{K^{2}}{4} + \frac{x^{3} (- x + K + \arctan (x))}{6} + \frac{K \arctan (x)}{2} + \frac{{(x - \arctan (x))}^{2}}{4}$

Step 6

Simplify the constant of integration.

$y = \frac{x^{6}}{36} - \frac{K x}{2} + K + \frac{x^{3} (- x + K + \arctan (x))}{6} + \frac{K \arctan (x)}{2} + \frac{{(x - \arctan (x))}^{2}}{4}$