Calculus Examples

$\frac{(2 u^{3} + 7) (3 u^{2} - 5)}{u^{2} + 1}$

Step 1

Differentiate using the Quotient Rule which states that $\frac{d}{d u} [\frac{f (u)}{g (u)}]$ is $\frac{g (u) \frac{d}{d u} [f (u)] - f (u) \frac{d}{d u} [g (u)]}{{g (u)}^{2}}$ where $f (u) = (2 u^{3} + 7) (3 u^{2} - 5)$ and $g (u) = u^{2} + 1$ .

$\frac{(u^{2} + 1) \frac{d}{d u} [(2 u^{3} + 7) (3 u^{2} - 5)] - (2 u^{3} + 7) (3 u^{2} - 5) \frac{d}{d u} [u^{2} + 1]}{{(u^{2} + 1)}^{2}}$

Step 2

Differentiate using the Product Rule which states that $\frac{d}{d u} [f (u) g (u)]$ is $f (u) \frac{d}{d u} [g (u)] + g (u) \frac{d}{d u} [f (u)]$ where $f (u) = 2 u^{3} + 7$ and $g (u) = 3 u^{2} - 5$ .

$\frac{(u^{2} + 1) ((2 u^{3} + 7) \frac{d}{d u} [3 u^{2} - 5] + (3 u^{2} - 5) \frac{d}{d u} [2 u^{3} + 7]) - (2 u^{3} + 7) (3 u^{2} - 5) \frac{d}{d u} [u^{2} + 1]}{{(u^{2} + 1)}^{2}}$

Step 3

Differentiate.

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Step 3.1

By the Sum Rule, the derivative of $3 u^{2} - 5$ with respect to $u$ is $\frac{d}{d u} [3 u^{2}] + \frac{d}{d u} [- 5]$ .

$\frac{(u^{2} + 1) ((2 u^{3} + 7) (\frac{d}{d u} [3 u^{2}] + \frac{d}{d u} [- 5]) + (3 u^{2} - 5) \frac{d}{d u} [2 u^{3} + 7]) - (2 u^{3} + 7) (3 u^{2} - 5) \frac{d}{d u} [u^{2} + 1]}{{(u^{2} + 1)}^{2}}$

Step 3.2

Since $3$ is constant with respect to $u$ , the derivative of $3 u^{2}$ with respect to $u$ is $3 \frac{d}{d u} [u^{2}]$ .

$\frac{(u^{2} + 1) ((2 u^{3} + 7) (3 \frac{d}{d u} [u^{2}] + \frac{d}{d u} [- 5]) + (3 u^{2} - 5) \frac{d}{d u} [2 u^{3} + 7]) - (2 u^{3} + 7) (3 u^{2} - 5) \frac{d}{d u} [u^{2} + 1]}{{(u^{2} + 1)}^{2}}$

Step 3.3

Differentiate using the Power Rule which states that $\frac{d}{d u} [u^{n}]$ is $n u^{n - 1}$ where $n = 2$ .

$\frac{(u^{2} + 1) ((2 u^{3} + 7) (3 (2 u) + \frac{d}{d u} [- 5]) + (3 u^{2} - 5) \frac{d}{d u} [2 u^{3} + 7]) - (2 u^{3} + 7) (3 u^{2} - 5) \frac{d}{d u} [u^{2} + 1]}{{(u^{2} + 1)}^{2}}$

Step 3.4

Multiply $2$ by $3$ .

$\frac{(u^{2} + 1) ((2 u^{3} + 7) (6 u + \frac{d}{d u} [- 5]) + (3 u^{2} - 5) \frac{d}{d u} [2 u^{3} + 7]) - (2 u^{3} + 7) (3 u^{2} - 5) \frac{d}{d u} [u^{2} + 1]}{{(u^{2} + 1)}^{2}}$

Step 3.5

Since $- 5$ is constant with respect to $u$ , the derivative of $- 5$ with respect to $u$ is $0$ .

$\frac{(u^{2} + 1) ((2 u^{3} + 7) (6 u + 0) + (3 u^{2} - 5) \frac{d}{d u} [2 u^{3} + 7]) - (2 u^{3} + 7) (3 u^{2} - 5) \frac{d}{d u} [u^{2} + 1]}{{(u^{2} + 1)}^{2}}$

Step 3.6

Simplify the expression.

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Step 3.6.1

Add $6 u$ and $0$ .

$\frac{(u^{2} + 1) ((2 u^{3} + 7) (6 u) + (3 u^{2} - 5) \frac{d}{d u} [2 u^{3} + 7]) - (2 u^{3} + 7) (3 u^{2} - 5) \frac{d}{d u} [u^{2} + 1]}{{(u^{2} + 1)}^{2}}$

Step 3.6.2

Move $6$ to the left of $2 u^{3} + 7$ .

$\frac{(u^{2} + 1) (6 \cdot (2 u^{3} + 7) u + (3 u^{2} - 5) \frac{d}{d u} [2 u^{3} + 7]) - (2 u^{3} + 7) (3 u^{2} - 5) \frac{d}{d u} [u^{2} + 1]}{{(u^{2} + 1)}^{2}}$

Step 3.7

By the Sum Rule, the derivative of $2 u^{3} + 7$ with respect to $u$ is $\frac{d}{d u} [2 u^{3}] + \frac{d}{d u} [7]$ .

$\frac{(u^{2} + 1) (6 (2 u^{3} + 7) u + (3 u^{2} - 5) (\frac{d}{d u} [2 u^{3}] + \frac{d}{d u} [7])) - (2 u^{3} + 7) (3 u^{2} - 5) \frac{d}{d u} [u^{2} + 1]}{{(u^{2} + 1)}^{2}}$

Step 3.8

Since $2$ is constant with respect to $u$ , the derivative of $2 u^{3}$ with respect to $u$ is $2 \frac{d}{d u} [u^{3}]$ .

$\frac{(u^{2} + 1) (6 (2 u^{3} + 7) u + (3 u^{2} - 5) (2 \frac{d}{d u} [u^{3}] + \frac{d}{d u} [7])) - (2 u^{3} + 7) (3 u^{2} - 5) \frac{d}{d u} [u^{2} + 1]}{{(u^{2} + 1)}^{2}}$

Step 3.9

Differentiate using the Power Rule which states that $\frac{d}{d u} [u^{n}]$ is $n u^{n - 1}$ where $n = 3$ .

$\frac{(u^{2} + 1) (6 (2 u^{3} + 7) u + (3 u^{2} - 5) (2 (3 u^{2}) + \frac{d}{d u} [7])) - (2 u^{3} + 7) (3 u^{2} - 5) \frac{d}{d u} [u^{2} + 1]}{{(u^{2} + 1)}^{2}}$

Step 3.10

Multiply $3$ by $2$ .

$\frac{(u^{2} + 1) (6 (2 u^{3} + 7) u + (3 u^{2} - 5) (6 u^{2} + \frac{d}{d u} [7])) - (2 u^{3} + 7) (3 u^{2} - 5) \frac{d}{d u} [u^{2} + 1]}{{(u^{2} + 1)}^{2}}$

Step 3.11

Since $7$ is constant with respect to $u$ , the derivative of $7$ with respect to $u$ is $0$ .

$\frac{(u^{2} + 1) (6 (2 u^{3} + 7) u + (3 u^{2} - 5) (6 u^{2} + 0)) - (2 u^{3} + 7) (3 u^{2} - 5) \frac{d}{d u} [u^{2} + 1]}{{(u^{2} + 1)}^{2}}$

Step 3.12

Simplify the expression.

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Step 3.12.1

Add $6 u^{2}$ and $0$ .

$\frac{(u^{2} + 1) (6 (2 u^{3} + 7) u + (3 u^{2} - 5) (6 u^{2})) - (2 u^{3} + 7) (3 u^{2} - 5) \frac{d}{d u} [u^{2} + 1]}{{(u^{2} + 1)}^{2}}$

Step 3.12.2

Move $6$ to the left of $3 u^{2} - 5$ .

$\frac{(u^{2} + 1) (6 (2 u^{3} + 7) u + 6 \cdot (3 u^{2} - 5) u^{2}) - (2 u^{3} + 7) (3 u^{2} - 5) \frac{d}{d u} [u^{2} + 1]}{{(u^{2} + 1)}^{2}}$

Step 4

Simplify.

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Step 4.1

Apply the distributive property.

$\frac{(u^{2} + 1) ((6 (2 u^{3}) + 6 \cdot 7) u + 6 (3 u^{2} - 5) u^{2}) - (2 u^{3} + 7) (3 u^{2} - 5) \frac{d}{d u} [u^{2} + 1]}{{(u^{2} + 1)}^{2}}$

Step 4.2

Apply the distributive property.

$\frac{(u^{2} + 1) (6 (2 u^{3}) u + 6 \cdot 7 u + 6 (3 u^{2} - 5) u^{2}) - (2 u^{3} + 7) (3 u^{2} - 5) \frac{d}{d u} [u^{2} + 1]}{{(u^{2} + 1)}^{2}}$

Step 4.3

Apply the distributive property.

$\frac{(u^{2} + 1) (6 (2 u^{3}) u + 6 \cdot 7 u + (6 (3 u^{2}) + 6 \cdot - 5) u^{2}) - (2 u^{3} + 7) (3 u^{2} - 5) \frac{d}{d u} [u^{2} + 1]}{{(u^{2} + 1)}^{2}}$

Step 4.4

Apply the distributive property.

$\frac{(u^{2} + 1) (6 (2 u^{3}) u + 6 \cdot 7 u + 6 (3 u^{2}) u^{2} + 6 \cdot - 5 u^{2}) - (2 u^{3} + 7) (3 u^{2} - 5) \frac{d}{d u} [u^{2} + 1]}{{(u^{2} + 1)}^{2}}$

Step 4.5

Combine terms.

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Step 4.5.1

Multiply $2$ by $6$ .

$\frac{(u^{2} + 1) (12 u^{3} u + 6 \cdot 7 u + 6 (3 u^{2}) u^{2} + 6 \cdot - 5 u^{2}) - (2 u^{3} + 7) (3 u^{2} - 5) \frac{d}{d u} [u^{2} + 1]}{{(u^{2} + 1)}^{2}}$

Step 4.5.2

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

$\frac{(u^{2} + 1) (12 (u^{1} u^{3}) + 6 \cdot 7 u + 6 (3 u^{2}) u^{2} + 6 \cdot - 5 u^{2}) - (2 u^{3} + 7) (3 u^{2} - 5) \frac{d}{d u} [u^{2} + 1]}{{(u^{2} + 1)}^{2}}$

Step 4.5.3

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

$\frac{(u^{2} + 1) (12 u^{1 + 3} + 6 \cdot 7 u + 6 (3 u^{2}) u^{2} + 6 \cdot - 5 u^{2}) - (2 u^{3} + 7) (3 u^{2} - 5) \frac{d}{d u} [u^{2} + 1]}{{(u^{2} + 1)}^{2}}$

Step 4.5.4

Add $1$ and $3$ .

$\frac{(u^{2} + 1) (12 u^{4} + 6 \cdot 7 u + 6 (3 u^{2}) u^{2} + 6 \cdot - 5 u^{2}) - (2 u^{3} + 7) (3 u^{2} - 5) \frac{d}{d u} [u^{2} + 1]}{{(u^{2} + 1)}^{2}}$

Step 4.5.5

Multiply $6$ by $7$ .

$\frac{(u^{2} + 1) (12 u^{4} + 42 u + 6 (3 u^{2}) u^{2} + 6 \cdot - 5 u^{2}) - (2 u^{3} + 7) (3 u^{2} - 5) \frac{d}{d u} [u^{2} + 1]}{{(u^{2} + 1)}^{2}}$

Step 4.5.6

Multiply $3$ by $6$ .

$\frac{(u^{2} + 1) (12 u^{4} + 42 u + 18 u^{2} u^{2} + 6 \cdot - 5 u^{2}) - (2 u^{3} + 7) (3 u^{2} - 5) \frac{d}{d u} [u^{2} + 1]}{{(u^{2} + 1)}^{2}}$

Step 4.5.7

Multiply $u^{2}$ by $u^{2}$ by adding the exponents.

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Step 4.5.7.1

Move $u^{2}$ .

$\frac{(u^{2} + 1) (12 u^{4} + 42 u + 18 (u^{2} u^{2}) + 6 \cdot - 5 u^{2}) - (2 u^{3} + 7) (3 u^{2} - 5) \frac{d}{d u} [u^{2} + 1]}{{(u^{2} + 1)}^{2}}$

Step 4.5.7.2

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

$\frac{(u^{2} + 1) (12 u^{4} + 42 u + 18 u^{2 + 2} + 6 \cdot - 5 u^{2}) - (2 u^{3} + 7) (3 u^{2} - 5) \frac{d}{d u} [u^{2} + 1]}{{(u^{2} + 1)}^{2}}$

Step 4.5.7.3

Add $2$ and $2$ .

$\frac{(u^{2} + 1) (12 u^{4} + 42 u + 18 u^{4} + 6 \cdot - 5 u^{2}) - (2 u^{3} + 7) (3 u^{2} - 5) \frac{d}{d u} [u^{2} + 1]}{{(u^{2} + 1)}^{2}}$

Step 4.5.8

Multiply $6$ by $- 5$ .

$\frac{(u^{2} + 1) (12 u^{4} + 42 u + 18 u^{4} - 30 u^{2}) - (2 u^{3} + 7) (3 u^{2} - 5) \frac{d}{d u} [u^{2} + 1]}{{(u^{2} + 1)}^{2}}$

Step 4.5.9

Add $12 u^{4}$ and $18 u^{4}$ .

$\frac{(u^{2} + 1) (30 u^{4} + 42 u - 30 u^{2}) - (2 u^{3} + 7) (3 u^{2} - 5) \frac{d}{d u} [u^{2} + 1]}{{(u^{2} + 1)}^{2}}$

Step 4.6

Reorder terms.

$\frac{(u^{2} + 1) (30 u^{4} - 30 u^{2} + 42 u) - (2 u^{3} + 7) (3 u^{2} - 5) \frac{d}{d u} [u^{2} + 1]}{{(u^{2} + 1)}^{2}}$

Step 5

By the Sum Rule, the derivative of $u^{2} + 1$ with respect to $u$ is $\frac{d}{d u} [u^{2}] + \frac{d}{d u} [1]$ .

$\frac{(u^{2} + 1) (30 u^{4} - 30 u^{2} + 42 u) - (2 u^{3} + 7) (3 u^{2} - 5) (\frac{d}{d u} [u^{2}] + \frac{d}{d u} [1])}{{(u^{2} + 1)}^{2}}$

Step 6

Differentiate using the Power Rule which states that $\frac{d}{d u} [u^{n}]$ is $n u^{n - 1}$ where $n = 2$ .

$\frac{(u^{2} + 1) (30 u^{4} - 30 u^{2} + 42 u) - (2 u^{3} + 7) (3 u^{2} - 5) (2 u + \frac{d}{d u} [1])}{{(u^{2} + 1)}^{2}}$

Step 7

Since $1$ is constant with respect to $u$ , the derivative of $1$ with respect to $u$ is $0$ .

$\frac{(u^{2} + 1) (30 u^{4} - 30 u^{2} + 42 u) - (2 u^{3} + 7) (3 u^{2} - 5) (2 u + 0)}{{(u^{2} + 1)}^{2}}$

Step 8

Add $2 u$ and $0$ .

$\frac{(u^{2} + 1) (30 u^{4} - 30 u^{2} + 42 u) - (2 u^{3} + 7) (3 u^{2} - 5) (2 u)}{{(u^{2} + 1)}^{2}}$

Step 9

Simplify.

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Step 9.1

Apply the distributive property.

$\frac{(u^{2} + 1) (30 u^{4} - 30 u^{2} + 42 u) + (- (2 u^{3}) - 1 \cdot 7) (3 u^{2} - 5) (2 u)}{{(u^{2} + 1)}^{2}}$

Step 9.2

Simplify the numerator.

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Step 9.2.1

Simplify each term.

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Step 9.2.1.1

Expand $(u^{2} + 1) (30 u^{4} - 30 u^{2} + 42 u)$ by multiplying each term in the first expression by each term in the second expression.

$\frac{u^{2} (30 u^{4}) + u^{2} (- 30 u^{2}) + u^{2} (42 u) + 1 (30 u^{4}) + 1 (- 30 u^{2}) + 1 (42 u) + (- (2 u^{3}) - 1 \cdot 7) (3 u^{2} - 5) (2 u)}{{(u^{2} + 1)}^{2}}$

Step 9.2.1.2

Simplify each term.

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Step 9.2.1.2.1

Rewrite using the commutative property of multiplication.

$\frac{30 u^{2} u^{4} + u^{2} (- 30 u^{2}) + u^{2} (42 u) + 1 (30 u^{4}) + 1 (- 30 u^{2}) + 1 (42 u) + (- (2 u^{3}) - 1 \cdot 7) (3 u^{2} - 5) (2 u)}{{(u^{2} + 1)}^{2}}$

Step 9.2.1.2.2

Multiply $u^{2}$ by $u^{4}$ by adding the exponents.

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Step 9.2.1.2.2.1

Move $u^{4}$ .

$\frac{30 (u^{4} u^{2}) + u^{2} (- 30 u^{2}) + u^{2} (42 u) + 1 (30 u^{4}) + 1 (- 30 u^{2}) + 1 (42 u) + (- (2 u^{3}) - 1 \cdot 7) (3 u^{2} - 5) (2 u)}{{(u^{2} + 1)}^{2}}$

Step 9.2.1.2.2.2

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

$\frac{30 u^{4 + 2} + u^{2} (- 30 u^{2}) + u^{2} (42 u) + 1 (30 u^{4}) + 1 (- 30 u^{2}) + 1 (42 u) + (- (2 u^{3}) - 1 \cdot 7) (3 u^{2} - 5) (2 u)}{{(u^{2} + 1)}^{2}}$

Step 9.2.1.2.2.3

Add $4$ and $2$ .

$\frac{30 u^{6} + u^{2} (- 30 u^{2}) + u^{2} (42 u) + 1 (30 u^{4}) + 1 (- 30 u^{2}) + 1 (42 u) + (- (2 u^{3}) - 1 \cdot 7) (3 u^{2} - 5) (2 u)}{{(u^{2} + 1)}^{2}}$

Step 9.2.1.2.3

Rewrite using the commutative property of multiplication.

$\frac{30 u^{6} - 30 u^{2} u^{2} + u^{2} (42 u) + 1 (30 u^{4}) + 1 (- 30 u^{2}) + 1 (42 u) + (- (2 u^{3}) - 1 \cdot 7) (3 u^{2} - 5) (2 u)}{{(u^{2} + 1)}^{2}}$

Step 9.2.1.2.4

Multiply $u^{2}$ by $u^{2}$ by adding the exponents.

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Step 9.2.1.2.4.1

Move $u^{2}$ .

$\frac{30 u^{6} - 30 (u^{2} u^{2}) + u^{2} (42 u) + 1 (30 u^{4}) + 1 (- 30 u^{2}) + 1 (42 u) + (- (2 u^{3}) - 1 \cdot 7) (3 u^{2} - 5) (2 u)}{{(u^{2} + 1)}^{2}}$

Step 9.2.1.2.4.2

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

$\frac{30 u^{6} - 30 u^{2 + 2} + u^{2} (42 u) + 1 (30 u^{4}) + 1 (- 30 u^{2}) + 1 (42 u) + (- (2 u^{3}) - 1 \cdot 7) (3 u^{2} - 5) (2 u)}{{(u^{2} + 1)}^{2}}$

Step 9.2.1.2.4.3

Add $2$ and $2$ .

$\frac{30 u^{6} - 30 u^{4} + u^{2} (42 u) + 1 (30 u^{4}) + 1 (- 30 u^{2}) + 1 (42 u) + (- (2 u^{3}) - 1 \cdot 7) (3 u^{2} - 5) (2 u)}{{(u^{2} + 1)}^{2}}$

Step 9.2.1.2.5

Rewrite using the commutative property of multiplication.

$\frac{30 u^{6} - 30 u^{4} + 42 u^{2} u + 1 (30 u^{4}) + 1 (- 30 u^{2}) + 1 (42 u) + (- (2 u^{3}) - 1 \cdot 7) (3 u^{2} - 5) (2 u)}{{(u^{2} + 1)}^{2}}$

Step 9.2.1.2.6

Multiply $u^{2}$ by $u$ by adding the exponents.

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Step 9.2.1.2.6.1

Move $u$ .

$\frac{30 u^{6} - 30 u^{4} + 42 (u \cdot u^{2}) + 1 (30 u^{4}) + 1 (- 30 u^{2}) + 1 (42 u) + (- (2 u^{3}) - 1 \cdot 7) (3 u^{2} - 5) (2 u)}{{(u^{2} + 1)}^{2}}$

Step 9.2.1.2.6.2

Multiply $u$ by $u^{2}$ .

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Step 9.2.1.2.6.2.1

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

$\frac{30 u^{6} - 30 u^{4} + 42 (u^{1} u^{2}) + 1 (30 u^{4}) + 1 (- 30 u^{2}) + 1 (42 u) + (- (2 u^{3}) - 1 \cdot 7) (3 u^{2} - 5) (2 u)}{{(u^{2} + 1)}^{2}}$

Step 9.2.1.2.6.2.2

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

$\frac{30 u^{6} - 30 u^{4} + 42 u^{1 + 2} + 1 (30 u^{4}) + 1 (- 30 u^{2}) + 1 (42 u) + (- (2 u^{3}) - 1 \cdot 7) (3 u^{2} - 5) (2 u)}{{(u^{2} + 1)}^{2}}$

Step 9.2.1.2.6.3

Add $1$ and $2$ .

$\frac{30 u^{6} - 30 u^{4} + 42 u^{3} + 1 (30 u^{4}) + 1 (- 30 u^{2}) + 1 (42 u) + (- (2 u^{3}) - 1 \cdot 7) (3 u^{2} - 5) (2 u)}{{(u^{2} + 1)}^{2}}$

Step 9.2.1.2.7

Multiply $30 u^{4}$ by $1$ .

$\frac{30 u^{6} - 30 u^{4} + 42 u^{3} + 30 u^{4} + 1 (- 30 u^{2}) + 1 (42 u) + (- (2 u^{3}) - 1 \cdot 7) (3 u^{2} - 5) (2 u)}{{(u^{2} + 1)}^{2}}$

Step 9.2.1.2.8

Multiply $- 30 u^{2}$ by $1$ .

$\frac{30 u^{6} - 30 u^{4} + 42 u^{3} + 30 u^{4} - 30 u^{2} + 1 (42 u) + (- (2 u^{3}) - 1 \cdot 7) (3 u^{2} - 5) (2 u)}{{(u^{2} + 1)}^{2}}$

Step 9.2.1.2.9

Multiply $42 u$ by $1$ .

$\frac{30 u^{6} - 30 u^{4} + 42 u^{3} + 30 u^{4} - 30 u^{2} + 42 u + (- (2 u^{3}) - 1 \cdot 7) (3 u^{2} - 5) (2 u)}{{(u^{2} + 1)}^{2}}$

Step 9.2.1.3

Combine the opposite terms in $30 u^{6} - 30 u^{4} + 42 u^{3} + 30 u^{4} - 30 u^{2} + 42 u$ .

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Step 9.2.1.3.1

Add $- 30 u^{4}$ and $30 u^{4}$ .

$\frac{30 u^{6} + 42 u^{3} + 0 - 30 u^{2} + 42 u + (- (2 u^{3}) - 1 \cdot 7) (3 u^{2} - 5) (2 u)}{{(u^{2} + 1)}^{2}}$

Step 9.2.1.3.2

Add $30 u^{6} + 42 u^{3}$ and $0$ .

$\frac{30 u^{6} + 42 u^{3} - 30 u^{2} + 42 u + (- (2 u^{3}) - 1 \cdot 7) (3 u^{2} - 5) (2 u)}{{(u^{2} + 1)}^{2}}$

Step 9.2.1.4

Rewrite using the commutative property of multiplication.

$\frac{30 u^{6} + 42 u^{3} - 30 u^{2} + 42 u + 2 (- 1 \cdot 2 u^{3} - 1 \cdot 7) (3 u^{2} - 5) u}{{(u^{2} + 1)}^{2}}$

Step 9.2.1.5

Simplify each term.

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Step 9.2.1.5.1

Multiply $- 1$ by $2$ .

$\frac{30 u^{6} + 42 u^{3} - 30 u^{2} + 42 u + 2 (- 2 u^{3} - 1 \cdot 7) (3 u^{2} - 5) u}{{(u^{2} + 1)}^{2}}$

Step 9.2.1.5.2

Multiply $- 1$ by $7$ .

$\frac{30 u^{6} + 42 u^{3} - 30 u^{2} + 42 u + 2 (- 2 u^{3} - 7) (3 u^{2} - 5) u}{{(u^{2} + 1)}^{2}}$

Step 9.2.1.6

Apply the distributive property.

$\frac{30 u^{6} + 42 u^{3} - 30 u^{2} + 42 u + (2 (- 2 u^{3}) + 2 \cdot - 7) (3 u^{2} - 5) u}{{(u^{2} + 1)}^{2}}$

Step 9.2.1.7

Multiply $- 2$ by $2$ .

$\frac{30 u^{6} + 42 u^{3} - 30 u^{2} + 42 u + (- 4 u^{3} + 2 \cdot - 7) (3 u^{2} - 5) u}{{(u^{2} + 1)}^{2}}$

Step 9.2.1.8

Multiply $2$ by $- 7$ .

$\frac{30 u^{6} + 42 u^{3} - 30 u^{2} + 42 u + (- 4 u^{3} - 14) (3 u^{2} - 5) u}{{(u^{2} + 1)}^{2}}$

Step 9.2.1.9

Expand $(- 4 u^{3} - 14) (3 u^{2} - 5)$ using the FOIL Method.

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Step 9.2.1.9.1

Apply the distributive property.

$\frac{30 u^{6} + 42 u^{3} - 30 u^{2} + 42 u + (- 4 u^{3} (3 u^{2} - 5) - 14 (3 u^{2} - 5)) u}{{(u^{2} + 1)}^{2}}$

Step 9.2.1.9.2

Apply the distributive property.

$\frac{30 u^{6} + 42 u^{3} - 30 u^{2} + 42 u + (- 4 u^{3} (3 u^{2}) - 4 u^{3} \cdot - 5 - 14 (3 u^{2} - 5)) u}{{(u^{2} + 1)}^{2}}$

Step 9.2.1.9.3

Apply the distributive property.

$\frac{30 u^{6} + 42 u^{3} - 30 u^{2} + 42 u + (- 4 u^{3} (3 u^{2}) - 4 u^{3} \cdot - 5 - 14 (3 u^{2}) - 14 \cdot - 5) u}{{(u^{2} + 1)}^{2}}$

Step 9.2.1.10

Simplify each term.

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Step 9.2.1.10.1

Rewrite using the commutative property of multiplication.

$\frac{30 u^{6} + 42 u^{3} - 30 u^{2} + 42 u + (- 4 \cdot 3 u^{3} u^{2} - 4 u^{3} \cdot - 5 - 14 (3 u^{2}) - 14 \cdot - 5) u}{{(u^{2} + 1)}^{2}}$

Step 9.2.1.10.2

Multiply $u^{3}$ by $u^{2}$ by adding the exponents.

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Step 9.2.1.10.2.1

Move $u^{2}$ .

$\frac{30 u^{6} + 42 u^{3} - 30 u^{2} + 42 u + (- 4 \cdot 3 (u^{2} u^{3}) - 4 u^{3} \cdot - 5 - 14 (3 u^{2}) - 14 \cdot - 5) u}{{(u^{2} + 1)}^{2}}$

Step 9.2.1.10.2.2

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

$\frac{30 u^{6} + 42 u^{3} - 30 u^{2} + 42 u + (- 4 \cdot 3 u^{2 + 3} - 4 u^{3} \cdot - 5 - 14 (3 u^{2}) - 14 \cdot - 5) u}{{(u^{2} + 1)}^{2}}$

Step 9.2.1.10.2.3

Add $2$ and $3$ .

$\frac{30 u^{6} + 42 u^{3} - 30 u^{2} + 42 u + (- 4 \cdot 3 u^{5} - 4 u^{3} \cdot - 5 - 14 (3 u^{2}) - 14 \cdot - 5) u}{{(u^{2} + 1)}^{2}}$

Step 9.2.1.10.3

Multiply $- 4$ by $3$ .

$\frac{30 u^{6} + 42 u^{3} - 30 u^{2} + 42 u + (- 12 u^{5} - 4 u^{3} \cdot - 5 - 14 (3 u^{2}) - 14 \cdot - 5) u}{{(u^{2} + 1)}^{2}}$

Step 9.2.1.10.4

Multiply $- 5$ by $- 4$ .

$\frac{30 u^{6} + 42 u^{3} - 30 u^{2} + 42 u + (- 12 u^{5} + 20 u^{3} - 14 (3 u^{2}) - 14 \cdot - 5) u}{{(u^{2} + 1)}^{2}}$

Step 9.2.1.10.5

Multiply $3$ by $- 14$ .

$\frac{30 u^{6} + 42 u^{3} - 30 u^{2} + 42 u + (- 12 u^{5} + 20 u^{3} - 42 u^{2} - 14 \cdot - 5) u}{{(u^{2} + 1)}^{2}}$

Step 9.2.1.10.6

Multiply $- 14$ by $- 5$ .

$\frac{30 u^{6} + 42 u^{3} - 30 u^{2} + 42 u + (- 12 u^{5} + 20 u^{3} - 42 u^{2} + 70) u}{{(u^{2} + 1)}^{2}}$

Step 9.2.1.11

Apply the distributive property.

$\frac{30 u^{6} + 42 u^{3} - 30 u^{2} + 42 u - 12 u^{5} u + 20 u^{3} u - 42 u^{2} u + 70 u}{{(u^{2} + 1)}^{2}}$

Step 9.2.1.12

Simplify.

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Step 9.2.1.12.1

Multiply $u^{5}$ by $u$ by adding the exponents.

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Step 9.2.1.12.1.1

Move $u$ .

$\frac{30 u^{6} + 42 u^{3} - 30 u^{2} + 42 u - 12 (u \cdot u^{5}) + 20 u^{3} u - 42 u^{2} u + 70 u}{{(u^{2} + 1)}^{2}}$

Step 9.2.1.12.1.2

Multiply $u$ by $u^{5}$ .

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Step 9.2.1.12.1.2.1

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

$\frac{30 u^{6} + 42 u^{3} - 30 u^{2} + 42 u - 12 (u^{1} u^{5}) + 20 u^{3} u - 42 u^{2} u + 70 u}{{(u^{2} + 1)}^{2}}$

Step 9.2.1.12.1.2.2

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

$\frac{30 u^{6} + 42 u^{3} - 30 u^{2} + 42 u - 12 u^{1 + 5} + 20 u^{3} u - 42 u^{2} u + 70 u}{{(u^{2} + 1)}^{2}}$

Step 9.2.1.12.1.3

Add $1$ and $5$ .

$\frac{30 u^{6} + 42 u^{3} - 30 u^{2} + 42 u - 12 u^{6} + 20 u^{3} u - 42 u^{2} u + 70 u}{{(u^{2} + 1)}^{2}}$

Step 9.2.1.12.2

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

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Step 9.2.1.12.2.1

Move $u$ .

$\frac{30 u^{6} + 42 u^{3} - 30 u^{2} + 42 u - 12 u^{6} + 20 (u \cdot u^{3}) - 42 u^{2} u + 70 u}{{(u^{2} + 1)}^{2}}$

Step 9.2.1.12.2.2

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

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Step 9.2.1.12.2.2.1

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

$\frac{30 u^{6} + 42 u^{3} - 30 u^{2} + 42 u - 12 u^{6} + 20 (u^{1} u^{3}) - 42 u^{2} u + 70 u}{{(u^{2} + 1)}^{2}}$

Step 9.2.1.12.2.2.2

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

$\frac{30 u^{6} + 42 u^{3} - 30 u^{2} + 42 u - 12 u^{6} + 20 u^{1 + 3} - 42 u^{2} u + 70 u}{{(u^{2} + 1)}^{2}}$

Step 9.2.1.12.2.3

Add $1$ and $3$ .

$\frac{30 u^{6} + 42 u^{3} - 30 u^{2} + 42 u - 12 u^{6} + 20 u^{4} - 42 u^{2} u + 70 u}{{(u^{2} + 1)}^{2}}$

Step 9.2.1.12.3

Multiply $u^{2}$ by $u$ by adding the exponents.

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Step 9.2.1.12.3.1

Move $u$ .

$\frac{30 u^{6} + 42 u^{3} - 30 u^{2} + 42 u - 12 u^{6} + 20 u^{4} - 42 (u \cdot u^{2}) + 70 u}{{(u^{2} + 1)}^{2}}$

Step 9.2.1.12.3.2

Multiply $u$ by $u^{2}$ .

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Step 9.2.1.12.3.2.1

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

$\frac{30 u^{6} + 42 u^{3} - 30 u^{2} + 42 u - 12 u^{6} + 20 u^{4} - 42 (u^{1} u^{2}) + 70 u}{{(u^{2} + 1)}^{2}}$

Step 9.2.1.12.3.2.2

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

$\frac{30 u^{6} + 42 u^{3} - 30 u^{2} + 42 u - 12 u^{6} + 20 u^{4} - 42 u^{1 + 2} + 70 u}{{(u^{2} + 1)}^{2}}$

Step 9.2.1.12.3.3

Add $1$ and $2$ .

$\frac{30 u^{6} + 42 u^{3} - 30 u^{2} + 42 u - 12 u^{6} + 20 u^{4} - 42 u^{3} + 70 u}{{(u^{2} + 1)}^{2}}$

Step 9.2.2

Combine the opposite terms in $30 u^{6} + 42 u^{3} - 30 u^{2} + 42 u - 12 u^{6} + 20 u^{4} - 42 u^{3} + 70 u$ .

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Step 9.2.2.1

Subtract $42 u^{3}$ from $42 u^{3}$ .

$\frac{30 u^{6} - 30 u^{2} + 42 u - 12 u^{6} + 20 u^{4} + 0 + 70 u}{{(u^{2} + 1)}^{2}}$

Step 9.2.2.2

Add $30 u^{6} - 30 u^{2} + 42 u - 12 u^{6} + 20 u^{4}$ and $0$ .

$\frac{30 u^{6} - 30 u^{2} + 42 u - 12 u^{6} + 20 u^{4} + 70 u}{{(u^{2} + 1)}^{2}}$

Step 9.2.3

Subtract $12 u^{6}$ from $30 u^{6}$ .

$\frac{18 u^{6} - 30 u^{2} + 42 u + 20 u^{4} + 70 u}{{(u^{2} + 1)}^{2}}$

Step 9.2.4

Add $42 u$ and $70 u$ .

$\frac{18 u^{6} - 30 u^{2} + 20 u^{4} + 112 u}{{(u^{2} + 1)}^{2}}$

Step 9.3

Reorder terms.

$\frac{18 u^{6} + 20 u^{4} - 30 u^{2} + 112 u}{{(u^{2} + 1)}^{2}}$

Step 9.4

Factor $2 u$ out of $18 u^{6} + 20 u^{4} - 30 u^{2} + 112 u$ .

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Step 9.4.1

Factor $2 u$ out of $18 u^{6}$ .

$\frac{2 u (9 u^{5}) + 20 u^{4} - 30 u^{2} + 112 u}{{(u^{2} + 1)}^{2}}$

Step 9.4.2

Factor $2 u$ out of $20 u^{4}$ .

$\frac{2 u (9 u^{5}) + 2 u (10 u^{3}) - 30 u^{2} + 112 u}{{(u^{2} + 1)}^{2}}$

Step 9.4.3

Factor $2 u$ out of $- 30 u^{2}$ .

$\frac{2 u (9 u^{5}) + 2 u (10 u^{3}) + 2 u (- 15 u) + 112 u}{{(u^{2} + 1)}^{2}}$

Step 9.4.4

Factor $2 u$ out of $112 u$ .

$\frac{2 u (9 u^{5}) + 2 u (10 u^{3}) + 2 u (- 15 u) + 2 u (56)}{{(u^{2} + 1)}^{2}}$

Step 9.4.5

Factor $2 u$ out of $2 u (9 u^{5}) + 2 u (10 u^{3})$ .

$\frac{2 u (9 u^{5} + 10 u^{3}) + 2 u (- 15 u) + 2 u (56)}{{(u^{2} + 1)}^{2}}$

Step 9.4.6

Factor $2 u$ out of $2 u (9 u^{5} + 10 u^{3}) + 2 u (- 15 u)$ .

$\frac{2 u (9 u^{5} + 10 u^{3} - 15 u) + 2 u (56)}{{(u^{2} + 1)}^{2}}$

Step 9.4.7

Factor $2 u$ out of $2 u (9 u^{5} + 10 u^{3} - 15 u) + 2 u (56)$ .

$\frac{2 u (9 u^{5} + 10 u^{3} - 15 u + 56)}{{(u^{2} + 1)}^{2}}$