Basic Math Examples

$(\frac{8}{y - 3} - \frac{7}{y}) \div (\frac{5}{y^{2 - 3 y}} + \frac{2}{y})$

Step 1

Rewrite the division as a fraction.

$\frac{\frac{8}{y - 3} - \frac{7}{y}}{\frac{5}{y^{2 - 3 y}} + \frac{2}{y}}$

Step 2

Multiply the numerator and denominator of the fraction by $(y - 3) y \cdot y^{2 - 3 y}$ .

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Step 2.1

Multiply $\frac{\frac{8}{y - 3} - \frac{7}{y}}{\frac{5}{y^{2 - 3 y}} + \frac{2}{y}}$ by $\frac{(y - 3) y \cdot y^{2 - 3 y}}{(y - 3) y \cdot y^{2 - 3 y}}$ .

$\frac{(y - 3) y \cdot y^{2 - 3 y}}{(y - 3) y \cdot y^{2 - 3 y}} \cdot \frac{\frac{8}{y - 3} - \frac{7}{y}}{\frac{5}{y^{2 - 3 y}} + \frac{2}{y}}$

Step 2.2

Combine.

$\frac{(y - 3) y \cdot y^{2 - 3 y} (\frac{8}{y - 3} - \frac{7}{y})}{(y - 3) y \cdot y^{2 - 3 y} (\frac{5}{y^{2 - 3 y}} + \frac{2}{y})}$

Step 3

Apply the distributive property.

$\frac{(y - 3) y \cdot y^{2 - 3 y} \frac{8}{y - 3} + (y - 3) y \cdot y^{2 - 3 y} (- \frac{7}{y})}{(y - 3) y \cdot y^{2 - 3 y} \frac{5}{y^{2 - 3 y}} + (y - 3) y \cdot y^{2 - 3 y} \frac{2}{y}}$

Step 4

Simplify by cancelling.

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Step 4.1

Cancel the common factor of $y - 3$ .

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Step 4.1.1

Factor $y - 3$ out of $(y - 3) y \cdot y^{2 - 3 y}$ .

$\frac{(y - 3) (y \cdot y^{2 - 3 y}) \frac{8}{y - 3} + (y - 3) y \cdot y^{2 - 3 y} (- \frac{7}{y})}{(y - 3) y \cdot y^{2 - 3 y} \frac{5}{y^{2 - 3 y}} + (y - 3) y \cdot y^{2 - 3 y} \frac{2}{y}}$

Step 4.1.2

Cancel the common factor.

$\frac{(y - 3) (y \cdot y^{2 - 3 y}) \frac{8}{y - 3} + (y - 3) y \cdot y^{2 - 3 y} (- \frac{7}{y})}{(y - 3) y \cdot y^{2 - 3 y} \frac{5}{y^{2 - 3 y}} + (y - 3) y \cdot y^{2 - 3 y} \frac{2}{y}}$

Step 4.1.3

Rewrite the expression.

$\frac{y \cdot y^{2 - 3 y} \cdot 8 + (y - 3) y \cdot y^{2 - 3 y} (- \frac{7}{y})}{(y - 3) y \cdot y^{2 - 3 y} \frac{5}{y^{2 - 3 y}} + (y - 3) y \cdot y^{2 - 3 y} \frac{2}{y}}$

Step 4.2

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

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Step 4.2.1

Multiply $y$ by $y^{2 - 3 y}$ .

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Step 4.2.1.1

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

$\frac{y^{1} y^{2 - 3 y} \cdot 8 + (y - 3) y \cdot y^{2 - 3 y} (- \frac{7}{y})}{(y - 3) y \cdot y^{2 - 3 y} \frac{5}{y^{2 - 3 y}} + (y - 3) y \cdot y^{2 - 3 y} \frac{2}{y}}$

Step 4.2.1.2

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

$\frac{y^{1 + 2 - 3 y} \cdot 8 + (y - 3) y \cdot y^{2 - 3 y} (- \frac{7}{y})}{(y - 3) y \cdot y^{2 - 3 y} \frac{5}{y^{2 - 3 y}} + (y - 3) y \cdot y^{2 - 3 y} \frac{2}{y}}$

Step 4.2.2

Add $1$ and $2$ .

$\frac{y^{3 - 3 y} \cdot 8 + (y - 3) y \cdot y^{2 - 3 y} (- \frac{7}{y})}{(y - 3) y \cdot y^{2 - 3 y} \frac{5}{y^{2 - 3 y}} + (y - 3) y \cdot y^{2 - 3 y} \frac{2}{y}}$

Step 4.3

Cancel the common factor of $y$ .

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Step 4.3.1

Move the leading negative in $- \frac{7}{y}$ into the numerator.

$\frac{y^{3 - 3 y} \cdot 8 + (y - 3) y \cdot y^{2 - 3 y} \frac{- 7}{y}}{(y - 3) y \cdot y^{2 - 3 y} \frac{5}{y^{2 - 3 y}} + (y - 3) y \cdot y^{2 - 3 y} \frac{2}{y}}$

Step 4.3.2

Factor $y$ out of $(y - 3) y \cdot y^{2 - 3 y}$ .

$\frac{y^{3 - 3 y} \cdot 8 + y ((y - 3) y^{2 - 3 y}) \frac{- 7}{y}}{(y - 3) y \cdot y^{2 - 3 y} \frac{5}{y^{2 - 3 y}} + (y - 3) y \cdot y^{2 - 3 y} \frac{2}{y}}$

Step 4.3.3

Cancel the common factor.

$\frac{y^{3 - 3 y} \cdot 8 + y ((y - 3) y^{2 - 3 y}) \frac{- 7}{y}}{(y - 3) y \cdot y^{2 - 3 y} \frac{5}{y^{2 - 3 y}} + (y - 3) y \cdot y^{2 - 3 y} \frac{2}{y}}$

Step 4.3.4

Rewrite the expression.

$\frac{y^{3 - 3 y} \cdot 8 + (y - 3) y^{2 - 3 y} \cdot - 7}{(y - 3) y \cdot y^{2 - 3 y} \frac{5}{y^{2 - 3 y}} + (y - 3) y \cdot y^{2 - 3 y} \frac{2}{y}}$

Step 4.4

Cancel the common factor of $y^{2 - 3 y}$ .

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Step 4.4.1

Factor $y^{2 - 3 y}$ out of $(y - 3) y \cdot y^{2 - 3 y}$ .

$\frac{y^{3 - 3 y} \cdot 8 + (y - 3) y^{2 - 3 y} \cdot - 7}{y^{2 - 3 y} ((y - 3) y) \frac{5}{y^{2 - 3 y}} + (y - 3) y \cdot y^{2 - 3 y} \frac{2}{y}}$

Step 4.4.2

Cancel the common factor.

$\frac{y^{3 - 3 y} \cdot 8 + (y - 3) y^{2 - 3 y} \cdot - 7}{y^{2 - 3 y} ((y - 3) y) \frac{5}{y^{2 - 3 y}} + (y - 3) y \cdot y^{2 - 3 y} \frac{2}{y}}$

Step 4.4.3

Rewrite the expression.

$\frac{y^{3 - 3 y} \cdot 8 + (y - 3) y^{2 - 3 y} \cdot - 7}{(y - 3) y \cdot 5 + (y - 3) y \cdot y^{2 - 3 y} \frac{2}{y}}$

Step 4.5

Cancel the common factor of $y$ .

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Step 4.5.1

Factor $y$ out of $(y - 3) y \cdot y^{2 - 3 y}$ .

$\frac{y^{3 - 3 y} \cdot 8 + (y - 3) y^{2 - 3 y} \cdot - 7}{(y - 3) y \cdot 5 + y ((y - 3) y^{2 - 3 y}) \frac{2}{y}}$

Step 4.5.2

Cancel the common factor.

$\frac{y^{3 - 3 y} \cdot 8 + (y - 3) y^{2 - 3 y} \cdot - 7}{(y - 3) y \cdot 5 + y ((y - 3) y^{2 - 3 y}) \frac{2}{y}}$

Step 4.5.3

Rewrite the expression.

$\frac{y^{3 - 3 y} \cdot 8 + (y - 3) y^{2 - 3 y} \cdot - 7}{(y - 3) y \cdot 5 + (y - 3) y^{2 - 3 y} \cdot 2}$

Step 5

Simplify the numerator.

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Step 5.1

Move $8$ to the left of $y^{3 - 3 y}$ .

$\frac{8 \cdot y^{3 - 3 y} + (y - 3) y^{2 - 3 y} \cdot - 7}{(y - 3) y \cdot 5 + (y - 3) y^{2 - 3 y} \cdot 2}$

Step 5.2

Apply the distributive property.

$\frac{8 y^{3 - 3 y} + (y \cdot y^{2 - 3 y} - 3 y^{2 - 3 y}) \cdot - 7}{(y - 3) y \cdot 5 + (y - 3) y^{2 - 3 y} \cdot 2}$

Step 5.3

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

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Step 5.3.1

Multiply $y$ by $y^{2 - 3 y}$ .

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Step 5.3.1.1

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

$\frac{8 y^{3 - 3 y} + (y^{1} y^{2 - 3 y} - 3 y^{2 - 3 y}) \cdot - 7}{(y - 3) y \cdot 5 + (y - 3) y^{2 - 3 y} \cdot 2}$

Step 5.3.1.2

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

$\frac{8 y^{3 - 3 y} + (y^{1 + 2 - 3 y} - 3 y^{2 - 3 y}) \cdot - 7}{(y - 3) y \cdot 5 + (y - 3) y^{2 - 3 y} \cdot 2}$

Step 5.3.2

Add $1$ and $2$ .

$\frac{8 y^{3 - 3 y} + (y^{3 - 3 y} - 3 y^{2 - 3 y}) \cdot - 7}{(y - 3) y \cdot 5 + (y - 3) y^{2 - 3 y} \cdot 2}$

Step 5.4

Apply the distributive property.

$\frac{8 y^{3 - 3 y} + y^{3 - 3 y} \cdot - 7 - 3 y^{2 - 3 y} \cdot - 7}{(y - 3) y \cdot 5 + (y - 3) y^{2 - 3 y} \cdot 2}$

Step 5.5

Move $- 7$ to the left of $y^{3 - 3 y}$ .

$\frac{8 y^{3 - 3 y} - 7 \cdot y^{3 - 3 y} - 3 y^{2 - 3 y} \cdot - 7}{(y - 3) y \cdot 5 + (y - 3) y^{2 - 3 y} \cdot 2}$

Step 5.6

Multiply $- 7$ by $- 3$ .

$\frac{8 y^{3 - 3 y} - 7 \cdot y^{3 - 3 y} + 21 y^{2 - 3 y}}{(y - 3) y \cdot 5 + (y - 3) y^{2 - 3 y} \cdot 2}$

Step 5.7

Subtract $7 y^{3 - 3 y}$ from $8 y^{3 - 3 y}$ .

$\frac{y^{3 - 3 y} + 21 y^{2 - 3 y}}{(y - 3) y \cdot 5 + (y - 3) y^{2 - 3 y} \cdot 2}$

Step 6

Simplify the denominator.

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Step 6.1

Factor $y - 3$ out of $(y - 3) y \cdot 5 + (y - 3) y^{2 - 3 y} \cdot 2$ .

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Step 6.1.1

Factor $y - 3$ out of $(y - 3) y \cdot 5$ .

$\frac{y^{3 - 3 y} + 21 y^{2 - 3 y}}{(y - 3) (y \cdot 5) + (y - 3) y^{2 - 3 y} \cdot 2}$

Step 6.1.2

Factor $y - 3$ out of $(y - 3) y^{2 - 3 y} \cdot 2$ .

$\frac{y^{3 - 3 y} + 21 y^{2 - 3 y}}{(y - 3) (y \cdot 5) + (y - 3) (y^{2 - 3 y} \cdot 2)}$

Step 6.1.3

Factor $y - 3$ out of $(y - 3) (y \cdot 5) + (y - 3) (y^{2 - 3 y} \cdot 2)$ .

$\frac{y^{3 - 3 y} + 21 y^{2 - 3 y}}{(y - 3) (y \cdot 5 + y^{2 - 3 y} \cdot 2)}$

Step 6.2

Move $5$ to the left of $y$ .

$\frac{y^{3 - 3 y} + 21 y^{2 - 3 y}}{(y - 3) (5 \cdot y + y^{2 - 3 y} \cdot 2)}$

Step 6.3

Move $2$ to the left of $y^{2 - 3 y}$ .

$\frac{y^{3 - 3 y} + 21 y^{2 - 3 y}}{(y - 3) (5 y + 2 y^{2 - 3 y})}$