Basic Math Examples

$(z - 5 z^{2} + z^{4} - 2) \cdot (3 z - 2 z^{4} + z^{2} + 4 z^{5} - 7)$

Step 1

Expand $(z - 5 z^{2} + z^{4} - 2) (3 z - 2 z^{4} + z^{2} + 4 z^{5} - 7)$ by multiplying each term in the first expression by each term in the second expression.

$z (3 z) + z (- 2 z^{4}) + z \cdot z^{2} + z (4 z^{5}) + z \cdot - 7 - 5 z^{2} (3 z) - 5 z^{2} (- 2 z^{4}) - 5 z^{2} z^{2} - 5 z^{2} (4 z^{5}) - 5 z^{2} \cdot - 7 + z^{4} (3 z) + z^{4} (- 2 z^{4}) + z^{4} z^{2} + z^{4} (4 z^{5}) + z^{4} \cdot - 7 - 2 (3 z) - 2 (- 2 z^{4}) - 2 z^{2} - 2 (4 z^{5}) - 2 \cdot - 7$

Step 2

Simplify terms.

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Step 2.1

Simplify each term.

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Step 2.1.1

Rewrite using the commutative property of multiplication.

$3 z \cdot z + z (- 2 z^{4}) + z \cdot z^{2} + z (4 z^{5}) + z \cdot - 7 - 5 z^{2} (3 z) - 5 z^{2} (- 2 z^{4}) - 5 z^{2} z^{2} - 5 z^{2} (4 z^{5}) - 5 z^{2} \cdot - 7 + z^{4} (3 z) + z^{4} (- 2 z^{4}) + z^{4} z^{2} + z^{4} (4 z^{5}) + z^{4} \cdot - 7 - 2 (3 z) - 2 (- 2 z^{4}) - 2 z^{2} - 2 (4 z^{5}) - 2 \cdot - 7$

Step 2.1.2

Multiply $z$ by $z$ by adding the exponents.

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Step 2.1.2.1

Move $z$ .

$3 (z \cdot z) + z (- 2 z^{4}) + z \cdot z^{2} + z (4 z^{5}) + z \cdot - 7 - 5 z^{2} (3 z) - 5 z^{2} (- 2 z^{4}) - 5 z^{2} z^{2} - 5 z^{2} (4 z^{5}) - 5 z^{2} \cdot - 7 + z^{4} (3 z) + z^{4} (- 2 z^{4}) + z^{4} z^{2} + z^{4} (4 z^{5}) + z^{4} \cdot - 7 - 2 (3 z) - 2 (- 2 z^{4}) - 2 z^{2} - 2 (4 z^{5}) - 2 \cdot - 7$

Step 2.1.2.2

Multiply $z$ by $z$ .

$3 z^{2} + z (- 2 z^{4}) + z \cdot z^{2} + z (4 z^{5}) + z \cdot - 7 - 5 z^{2} (3 z) - 5 z^{2} (- 2 z^{4}) - 5 z^{2} z^{2} - 5 z^{2} (4 z^{5}) - 5 z^{2} \cdot - 7 + z^{4} (3 z) + z^{4} (- 2 z^{4}) + z^{4} z^{2} + z^{4} (4 z^{5}) + z^{4} \cdot - 7 - 2 (3 z) - 2 (- 2 z^{4}) - 2 z^{2} - 2 (4 z^{5}) - 2 \cdot - 7$

Step 2.1.3

Rewrite using the commutative property of multiplication.

$3 z^{2} - 2 z \cdot z^{4} + z \cdot z^{2} + z (4 z^{5}) + z \cdot - 7 - 5 z^{2} (3 z) - 5 z^{2} (- 2 z^{4}) - 5 z^{2} z^{2} - 5 z^{2} (4 z^{5}) - 5 z^{2} \cdot - 7 + z^{4} (3 z) + z^{4} (- 2 z^{4}) + z^{4} z^{2} + z^{4} (4 z^{5}) + z^{4} \cdot - 7 - 2 (3 z) - 2 (- 2 z^{4}) - 2 z^{2} - 2 (4 z^{5}) - 2 \cdot - 7$

Step 2.1.4

Multiply $z$ by $z^{4}$ by adding the exponents.

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Step 2.1.4.1

Move $z^{4}$ .

$3 z^{2} - 2 (z^{4} z) + z \cdot z^{2} + z (4 z^{5}) + z \cdot - 7 - 5 z^{2} (3 z) - 5 z^{2} (- 2 z^{4}) - 5 z^{2} z^{2} - 5 z^{2} (4 z^{5}) - 5 z^{2} \cdot - 7 + z^{4} (3 z) + z^{4} (- 2 z^{4}) + z^{4} z^{2} + z^{4} (4 z^{5}) + z^{4} \cdot - 7 - 2 (3 z) - 2 (- 2 z^{4}) - 2 z^{2} - 2 (4 z^{5}) - 2 \cdot - 7$

Step 2.1.4.2

Multiply $z^{4}$ by $z$ .

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Step 2.1.4.2.1

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

$3 z^{2} - 2 (z^{4} z^{1}) + z \cdot z^{2} + z (4 z^{5}) + z \cdot - 7 - 5 z^{2} (3 z) - 5 z^{2} (- 2 z^{4}) - 5 z^{2} z^{2} - 5 z^{2} (4 z^{5}) - 5 z^{2} \cdot - 7 + z^{4} (3 z) + z^{4} (- 2 z^{4}) + z^{4} z^{2} + z^{4} (4 z^{5}) + z^{4} \cdot - 7 - 2 (3 z) - 2 (- 2 z^{4}) - 2 z^{2} - 2 (4 z^{5}) - 2 \cdot - 7$

Step 2.1.4.2.2

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

$3 z^{2} - 2 z^{4 + 1} + z \cdot z^{2} + z (4 z^{5}) + z \cdot - 7 - 5 z^{2} (3 z) - 5 z^{2} (- 2 z^{4}) - 5 z^{2} z^{2} - 5 z^{2} (4 z^{5}) - 5 z^{2} \cdot - 7 + z^{4} (3 z) + z^{4} (- 2 z^{4}) + z^{4} z^{2} + z^{4} (4 z^{5}) + z^{4} \cdot - 7 - 2 (3 z) - 2 (- 2 z^{4}) - 2 z^{2} - 2 (4 z^{5}) - 2 \cdot - 7$

Step 2.1.4.3

Add $4$ and $1$ .

$3 z^{2} - 2 z^{5} + z \cdot z^{2} + z (4 z^{5}) + z \cdot - 7 - 5 z^{2} (3 z) - 5 z^{2} (- 2 z^{4}) - 5 z^{2} z^{2} - 5 z^{2} (4 z^{5}) - 5 z^{2} \cdot - 7 + z^{4} (3 z) + z^{4} (- 2 z^{4}) + z^{4} z^{2} + z^{4} (4 z^{5}) + z^{4} \cdot - 7 - 2 (3 z) - 2 (- 2 z^{4}) - 2 z^{2} - 2 (4 z^{5}) - 2 \cdot - 7$

Step 2.1.5

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

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Step 2.1.5.1

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

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Step 2.1.5.1.1

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

$3 z^{2} - 2 z^{5} + z^{1} z^{2} + z (4 z^{5}) + z \cdot - 7 - 5 z^{2} (3 z) - 5 z^{2} (- 2 z^{4}) - 5 z^{2} z^{2} - 5 z^{2} (4 z^{5}) - 5 z^{2} \cdot - 7 + z^{4} (3 z) + z^{4} (- 2 z^{4}) + z^{4} z^{2} + z^{4} (4 z^{5}) + z^{4} \cdot - 7 - 2 (3 z) - 2 (- 2 z^{4}) - 2 z^{2} - 2 (4 z^{5}) - 2 \cdot - 7$

Step 2.1.5.1.2

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

$3 z^{2} - 2 z^{5} + z^{1 + 2} + z (4 z^{5}) + z \cdot - 7 - 5 z^{2} (3 z) - 5 z^{2} (- 2 z^{4}) - 5 z^{2} z^{2} - 5 z^{2} (4 z^{5}) - 5 z^{2} \cdot - 7 + z^{4} (3 z) + z^{4} (- 2 z^{4}) + z^{4} z^{2} + z^{4} (4 z^{5}) + z^{4} \cdot - 7 - 2 (3 z) - 2 (- 2 z^{4}) - 2 z^{2} - 2 (4 z^{5}) - 2 \cdot - 7$

Step 2.1.5.2

Add $1$ and $2$ .

$3 z^{2} - 2 z^{5} + z^{3} + z (4 z^{5}) + z \cdot - 7 - 5 z^{2} (3 z) - 5 z^{2} (- 2 z^{4}) - 5 z^{2} z^{2} - 5 z^{2} (4 z^{5}) - 5 z^{2} \cdot - 7 + z^{4} (3 z) + z^{4} (- 2 z^{4}) + z^{4} z^{2} + z^{4} (4 z^{5}) + z^{4} \cdot - 7 - 2 (3 z) - 2 (- 2 z^{4}) - 2 z^{2} - 2 (4 z^{5}) - 2 \cdot - 7$

Step 2.1.6

Rewrite using the commutative property of multiplication.

$3 z^{2} - 2 z^{5} + z^{3} + 4 z \cdot z^{5} + z \cdot - 7 - 5 z^{2} (3 z) - 5 z^{2} (- 2 z^{4}) - 5 z^{2} z^{2} - 5 z^{2} (4 z^{5}) - 5 z^{2} \cdot - 7 + z^{4} (3 z) + z^{4} (- 2 z^{4}) + z^{4} z^{2} + z^{4} (4 z^{5}) + z^{4} \cdot - 7 - 2 (3 z) - 2 (- 2 z^{4}) - 2 z^{2} - 2 (4 z^{5}) - 2 \cdot - 7$

Step 2.1.7

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

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Step 2.1.7.1

Move $z^{5}$ .

$3 z^{2} - 2 z^{5} + z^{3} + 4 (z^{5} z) + z \cdot - 7 - 5 z^{2} (3 z) - 5 z^{2} (- 2 z^{4}) - 5 z^{2} z^{2} - 5 z^{2} (4 z^{5}) - 5 z^{2} \cdot - 7 + z^{4} (3 z) + z^{4} (- 2 z^{4}) + z^{4} z^{2} + z^{4} (4 z^{5}) + z^{4} \cdot - 7 - 2 (3 z) - 2 (- 2 z^{4}) - 2 z^{2} - 2 (4 z^{5}) - 2 \cdot - 7$

Step 2.1.7.2

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

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Step 2.1.7.2.1

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

$3 z^{2} - 2 z^{5} + z^{3} + 4 (z^{5} z^{1}) + z \cdot - 7 - 5 z^{2} (3 z) - 5 z^{2} (- 2 z^{4}) - 5 z^{2} z^{2} - 5 z^{2} (4 z^{5}) - 5 z^{2} \cdot - 7 + z^{4} (3 z) + z^{4} (- 2 z^{4}) + z^{4} z^{2} + z^{4} (4 z^{5}) + z^{4} \cdot - 7 - 2 (3 z) - 2 (- 2 z^{4}) - 2 z^{2} - 2 (4 z^{5}) - 2 \cdot - 7$

Step 2.1.7.2.2

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

$3 z^{2} - 2 z^{5} + z^{3} + 4 z^{5 + 1} + z \cdot - 7 - 5 z^{2} (3 z) - 5 z^{2} (- 2 z^{4}) - 5 z^{2} z^{2} - 5 z^{2} (4 z^{5}) - 5 z^{2} \cdot - 7 + z^{4} (3 z) + z^{4} (- 2 z^{4}) + z^{4} z^{2} + z^{4} (4 z^{5}) + z^{4} \cdot - 7 - 2 (3 z) - 2 (- 2 z^{4}) - 2 z^{2} - 2 (4 z^{5}) - 2 \cdot - 7$

Step 2.1.7.3

Add $5$ and $1$ .

$3 z^{2} - 2 z^{5} + z^{3} + 4 z^{6} + z \cdot - 7 - 5 z^{2} (3 z) - 5 z^{2} (- 2 z^{4}) - 5 z^{2} z^{2} - 5 z^{2} (4 z^{5}) - 5 z^{2} \cdot - 7 + z^{4} (3 z) + z^{4} (- 2 z^{4}) + z^{4} z^{2} + z^{4} (4 z^{5}) + z^{4} \cdot - 7 - 2 (3 z) - 2 (- 2 z^{4}) - 2 z^{2} - 2 (4 z^{5}) - 2 \cdot - 7$

Step 2.1.8

Move $- 7$ to the left of $z$ .

$3 z^{2} - 2 z^{5} + z^{3} + 4 z^{6} - 7 \cdot z - 5 z^{2} (3 z) - 5 z^{2} (- 2 z^{4}) - 5 z^{2} z^{2} - 5 z^{2} (4 z^{5}) - 5 z^{2} \cdot - 7 + z^{4} (3 z) + z^{4} (- 2 z^{4}) + z^{4} z^{2} + z^{4} (4 z^{5}) + z^{4} \cdot - 7 - 2 (3 z) - 2 (- 2 z^{4}) - 2 z^{2} - 2 (4 z^{5}) - 2 \cdot - 7$

Step 2.1.9

Rewrite using the commutative property of multiplication.

$3 z^{2} - 2 z^{5} + z^{3} + 4 z^{6} - 7 z - 5 \cdot 3 z^{2} z - 5 z^{2} (- 2 z^{4}) - 5 z^{2} z^{2} - 5 z^{2} (4 z^{5}) - 5 z^{2} \cdot - 7 + z^{4} (3 z) + z^{4} (- 2 z^{4}) + z^{4} z^{2} + z^{4} (4 z^{5}) + z^{4} \cdot - 7 - 2 (3 z) - 2 (- 2 z^{4}) - 2 z^{2} - 2 (4 z^{5}) - 2 \cdot - 7$

Step 2.1.10

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

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Step 2.1.10.1

Move $z$ .

$3 z^{2} - 2 z^{5} + z^{3} + 4 z^{6} - 7 z - 5 \cdot 3 (z \cdot z^{2}) - 5 z^{2} (- 2 z^{4}) - 5 z^{2} z^{2} - 5 z^{2} (4 z^{5}) - 5 z^{2} \cdot - 7 + z^{4} (3 z) + z^{4} (- 2 z^{4}) + z^{4} z^{2} + z^{4} (4 z^{5}) + z^{4} \cdot - 7 - 2 (3 z) - 2 (- 2 z^{4}) - 2 z^{2} - 2 (4 z^{5}) - 2 \cdot - 7$

Step 2.1.10.2

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

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Step 2.1.10.2.1

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

$3 z^{2} - 2 z^{5} + z^{3} + 4 z^{6} - 7 z - 5 \cdot 3 (z^{1} z^{2}) - 5 z^{2} (- 2 z^{4}) - 5 z^{2} z^{2} - 5 z^{2} (4 z^{5}) - 5 z^{2} \cdot - 7 + z^{4} (3 z) + z^{4} (- 2 z^{4}) + z^{4} z^{2} + z^{4} (4 z^{5}) + z^{4} \cdot - 7 - 2 (3 z) - 2 (- 2 z^{4}) - 2 z^{2} - 2 (4 z^{5}) - 2 \cdot - 7$

Step 2.1.10.2.2

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

$3 z^{2} - 2 z^{5} + z^{3} + 4 z^{6} - 7 z - 5 \cdot 3 z^{1 + 2} - 5 z^{2} (- 2 z^{4}) - 5 z^{2} z^{2} - 5 z^{2} (4 z^{5}) - 5 z^{2} \cdot - 7 + z^{4} (3 z) + z^{4} (- 2 z^{4}) + z^{4} z^{2} + z^{4} (4 z^{5}) + z^{4} \cdot - 7 - 2 (3 z) - 2 (- 2 z^{4}) - 2 z^{2} - 2 (4 z^{5}) - 2 \cdot - 7$

Step 2.1.10.3

Add $1$ and $2$ .

$3 z^{2} - 2 z^{5} + z^{3} + 4 z^{6} - 7 z - 5 \cdot 3 z^{3} - 5 z^{2} (- 2 z^{4}) - 5 z^{2} z^{2} - 5 z^{2} (4 z^{5}) - 5 z^{2} \cdot - 7 + z^{4} (3 z) + z^{4} (- 2 z^{4}) + z^{4} z^{2} + z^{4} (4 z^{5}) + z^{4} \cdot - 7 - 2 (3 z) - 2 (- 2 z^{4}) - 2 z^{2} - 2 (4 z^{5}) - 2 \cdot - 7$

Step 2.1.11

Multiply $- 5$ by $3$ .

$3 z^{2} - 2 z^{5} + z^{3} + 4 z^{6} - 7 z - 15 z^{3} - 5 z^{2} (- 2 z^{4}) - 5 z^{2} z^{2} - 5 z^{2} (4 z^{5}) - 5 z^{2} \cdot - 7 + z^{4} (3 z) + z^{4} (- 2 z^{4}) + z^{4} z^{2} + z^{4} (4 z^{5}) + z^{4} \cdot - 7 - 2 (3 z) - 2 (- 2 z^{4}) - 2 z^{2} - 2 (4 z^{5}) - 2 \cdot - 7$

Step 2.1.12

Rewrite using the commutative property of multiplication.

$3 z^{2} - 2 z^{5} + z^{3} + 4 z^{6} - 7 z - 15 z^{3} - 5 \cdot - 2 z^{2} z^{4} - 5 z^{2} z^{2} - 5 z^{2} (4 z^{5}) - 5 z^{2} \cdot - 7 + z^{4} (3 z) + z^{4} (- 2 z^{4}) + z^{4} z^{2} + z^{4} (4 z^{5}) + z^{4} \cdot - 7 - 2 (3 z) - 2 (- 2 z^{4}) - 2 z^{2} - 2 (4 z^{5}) - 2 \cdot - 7$

Step 2.1.13

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

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Step 2.1.13.1

Move $z^{4}$ .

$3 z^{2} - 2 z^{5} + z^{3} + 4 z^{6} - 7 z - 15 z^{3} - 5 \cdot - 2 (z^{4} z^{2}) - 5 z^{2} z^{2} - 5 z^{2} (4 z^{5}) - 5 z^{2} \cdot - 7 + z^{4} (3 z) + z^{4} (- 2 z^{4}) + z^{4} z^{2} + z^{4} (4 z^{5}) + z^{4} \cdot - 7 - 2 (3 z) - 2 (- 2 z^{4}) - 2 z^{2} - 2 (4 z^{5}) - 2 \cdot - 7$

Step 2.1.13.2

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

$3 z^{2} - 2 z^{5} + z^{3} + 4 z^{6} - 7 z - 15 z^{3} - 5 \cdot - 2 z^{4 + 2} - 5 z^{2} z^{2} - 5 z^{2} (4 z^{5}) - 5 z^{2} \cdot - 7 + z^{4} (3 z) + z^{4} (- 2 z^{4}) + z^{4} z^{2} + z^{4} (4 z^{5}) + z^{4} \cdot - 7 - 2 (3 z) - 2 (- 2 z^{4}) - 2 z^{2} - 2 (4 z^{5}) - 2 \cdot - 7$

Step 2.1.13.3

Add $4$ and $2$ .

$3 z^{2} - 2 z^{5} + z^{3} + 4 z^{6} - 7 z - 15 z^{3} - 5 \cdot - 2 z^{6} - 5 z^{2} z^{2} - 5 z^{2} (4 z^{5}) - 5 z^{2} \cdot - 7 + z^{4} (3 z) + z^{4} (- 2 z^{4}) + z^{4} z^{2} + z^{4} (4 z^{5}) + z^{4} \cdot - 7 - 2 (3 z) - 2 (- 2 z^{4}) - 2 z^{2} - 2 (4 z^{5}) - 2 \cdot - 7$

Step 2.1.14

Multiply $- 5$ by $- 2$ .

$3 z^{2} - 2 z^{5} + z^{3} + 4 z^{6} - 7 z - 15 z^{3} + 10 z^{6} - 5 z^{2} z^{2} - 5 z^{2} (4 z^{5}) - 5 z^{2} \cdot - 7 + z^{4} (3 z) + z^{4} (- 2 z^{4}) + z^{4} z^{2} + z^{4} (4 z^{5}) + z^{4} \cdot - 7 - 2 (3 z) - 2 (- 2 z^{4}) - 2 z^{2} - 2 (4 z^{5}) - 2 \cdot - 7$

Step 2.1.15

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

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Step 2.1.15.1

Move $z^{2}$ .

$3 z^{2} - 2 z^{5} + z^{3} + 4 z^{6} - 7 z - 15 z^{3} + 10 z^{6} - 5 (z^{2} z^{2}) - 5 z^{2} (4 z^{5}) - 5 z^{2} \cdot - 7 + z^{4} (3 z) + z^{4} (- 2 z^{4}) + z^{4} z^{2} + z^{4} (4 z^{5}) + z^{4} \cdot - 7 - 2 (3 z) - 2 (- 2 z^{4}) - 2 z^{2} - 2 (4 z^{5}) - 2 \cdot - 7$

Step 2.1.15.2

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

$3 z^{2} - 2 z^{5} + z^{3} + 4 z^{6} - 7 z - 15 z^{3} + 10 z^{6} - 5 z^{2 + 2} - 5 z^{2} (4 z^{5}) - 5 z^{2} \cdot - 7 + z^{4} (3 z) + z^{4} (- 2 z^{4}) + z^{4} z^{2} + z^{4} (4 z^{5}) + z^{4} \cdot - 7 - 2 (3 z) - 2 (- 2 z^{4}) - 2 z^{2} - 2 (4 z^{5}) - 2 \cdot - 7$

Step 2.1.15.3

Add $2$ and $2$ .

$3 z^{2} - 2 z^{5} + z^{3} + 4 z^{6} - 7 z - 15 z^{3} + 10 z^{6} - 5 z^{4} - 5 z^{2} (4 z^{5}) - 5 z^{2} \cdot - 7 + z^{4} (3 z) + z^{4} (- 2 z^{4}) + z^{4} z^{2} + z^{4} (4 z^{5}) + z^{4} \cdot - 7 - 2 (3 z) - 2 (- 2 z^{4}) - 2 z^{2} - 2 (4 z^{5}) - 2 \cdot - 7$

Step 2.1.16

Rewrite using the commutative property of multiplication.

$3 z^{2} - 2 z^{5} + z^{3} + 4 z^{6} - 7 z - 15 z^{3} + 10 z^{6} - 5 z^{4} - 5 \cdot 4 z^{2} z^{5} - 5 z^{2} \cdot - 7 + z^{4} (3 z) + z^{4} (- 2 z^{4}) + z^{4} z^{2} + z^{4} (4 z^{5}) + z^{4} \cdot - 7 - 2 (3 z) - 2 (- 2 z^{4}) - 2 z^{2} - 2 (4 z^{5}) - 2 \cdot - 7$

Step 2.1.17

Multiply $z^{2}$ by $z^{5}$ by adding the exponents.

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Step 2.1.17.1

Move $z^{5}$ .

$3 z^{2} - 2 z^{5} + z^{3} + 4 z^{6} - 7 z - 15 z^{3} + 10 z^{6} - 5 z^{4} - 5 \cdot 4 (z^{5} z^{2}) - 5 z^{2} \cdot - 7 + z^{4} (3 z) + z^{4} (- 2 z^{4}) + z^{4} z^{2} + z^{4} (4 z^{5}) + z^{4} \cdot - 7 - 2 (3 z) - 2 (- 2 z^{4}) - 2 z^{2} - 2 (4 z^{5}) - 2 \cdot - 7$

Step 2.1.17.2

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

$3 z^{2} - 2 z^{5} + z^{3} + 4 z^{6} - 7 z - 15 z^{3} + 10 z^{6} - 5 z^{4} - 5 \cdot 4 z^{5 + 2} - 5 z^{2} \cdot - 7 + z^{4} (3 z) + z^{4} (- 2 z^{4}) + z^{4} z^{2} + z^{4} (4 z^{5}) + z^{4} \cdot - 7 - 2 (3 z) - 2 (- 2 z^{4}) - 2 z^{2} - 2 (4 z^{5}) - 2 \cdot - 7$

Step 2.1.17.3

Add $5$ and $2$ .

$3 z^{2} - 2 z^{5} + z^{3} + 4 z^{6} - 7 z - 15 z^{3} + 10 z^{6} - 5 z^{4} - 5 \cdot 4 z^{7} - 5 z^{2} \cdot - 7 + z^{4} (3 z) + z^{4} (- 2 z^{4}) + z^{4} z^{2} + z^{4} (4 z^{5}) + z^{4} \cdot - 7 - 2 (3 z) - 2 (- 2 z^{4}) - 2 z^{2} - 2 (4 z^{5}) - 2 \cdot - 7$

Step 2.1.18

Multiply $- 5$ by $4$ .

$3 z^{2} - 2 z^{5} + z^{3} + 4 z^{6} - 7 z - 15 z^{3} + 10 z^{6} - 5 z^{4} - 20 z^{7} - 5 z^{2} \cdot - 7 + z^{4} (3 z) + z^{4} (- 2 z^{4}) + z^{4} z^{2} + z^{4} (4 z^{5}) + z^{4} \cdot - 7 - 2 (3 z) - 2 (- 2 z^{4}) - 2 z^{2} - 2 (4 z^{5}) - 2 \cdot - 7$

Step 2.1.19

Multiply $- 7$ by $- 5$ .

$3 z^{2} - 2 z^{5} + z^{3} + 4 z^{6} - 7 z - 15 z^{3} + 10 z^{6} - 5 z^{4} - 20 z^{7} + 35 z^{2} + z^{4} (3 z) + z^{4} (- 2 z^{4}) + z^{4} z^{2} + z^{4} (4 z^{5}) + z^{4} \cdot - 7 - 2 (3 z) - 2 (- 2 z^{4}) - 2 z^{2} - 2 (4 z^{5}) - 2 \cdot - 7$

Step 2.1.20

Rewrite using the commutative property of multiplication.

$3 z^{2} - 2 z^{5} + z^{3} + 4 z^{6} - 7 z - 15 z^{3} + 10 z^{6} - 5 z^{4} - 20 z^{7} + 35 z^{2} + 3 z^{4} z + z^{4} (- 2 z^{4}) + z^{4} z^{2} + z^{4} (4 z^{5}) + z^{4} \cdot - 7 - 2 (3 z) - 2 (- 2 z^{4}) - 2 z^{2} - 2 (4 z^{5}) - 2 \cdot - 7$

Step 2.1.21

Multiply $z^{4}$ by $z$ by adding the exponents.

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Step 2.1.21.1

Move $z$ .

$3 z^{2} - 2 z^{5} + z^{3} + 4 z^{6} - 7 z - 15 z^{3} + 10 z^{6} - 5 z^{4} - 20 z^{7} + 35 z^{2} + 3 (z \cdot z^{4}) + z^{4} (- 2 z^{4}) + z^{4} z^{2} + z^{4} (4 z^{5}) + z^{4} \cdot - 7 - 2 (3 z) - 2 (- 2 z^{4}) - 2 z^{2} - 2 (4 z^{5}) - 2 \cdot - 7$

Step 2.1.21.2

Multiply $z$ by $z^{4}$ .

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Step 2.1.21.2.1

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

$3 z^{2} - 2 z^{5} + z^{3} + 4 z^{6} - 7 z - 15 z^{3} + 10 z^{6} - 5 z^{4} - 20 z^{7} + 35 z^{2} + 3 (z^{1} z^{4}) + z^{4} (- 2 z^{4}) + z^{4} z^{2} + z^{4} (4 z^{5}) + z^{4} \cdot - 7 - 2 (3 z) - 2 (- 2 z^{4}) - 2 z^{2} - 2 (4 z^{5}) - 2 \cdot - 7$

Step 2.1.21.2.2

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

$3 z^{2} - 2 z^{5} + z^{3} + 4 z^{6} - 7 z - 15 z^{3} + 10 z^{6} - 5 z^{4} - 20 z^{7} + 35 z^{2} + 3 z^{1 + 4} + z^{4} (- 2 z^{4}) + z^{4} z^{2} + z^{4} (4 z^{5}) + z^{4} \cdot - 7 - 2 (3 z) - 2 (- 2 z^{4}) - 2 z^{2} - 2 (4 z^{5}) - 2 \cdot - 7$

Step 2.1.21.3

Add $1$ and $4$ .

$3 z^{2} - 2 z^{5} + z^{3} + 4 z^{6} - 7 z - 15 z^{3} + 10 z^{6} - 5 z^{4} - 20 z^{7} + 35 z^{2} + 3 z^{5} + z^{4} (- 2 z^{4}) + z^{4} z^{2} + z^{4} (4 z^{5}) + z^{4} \cdot - 7 - 2 (3 z) - 2 (- 2 z^{4}) - 2 z^{2} - 2 (4 z^{5}) - 2 \cdot - 7$

Step 2.1.22

Rewrite using the commutative property of multiplication.

$3 z^{2} - 2 z^{5} + z^{3} + 4 z^{6} - 7 z - 15 z^{3} + 10 z^{6} - 5 z^{4} - 20 z^{7} + 35 z^{2} + 3 z^{5} - 2 z^{4} z^{4} + z^{4} z^{2} + z^{4} (4 z^{5}) + z^{4} \cdot - 7 - 2 (3 z) - 2 (- 2 z^{4}) - 2 z^{2} - 2 (4 z^{5}) - 2 \cdot - 7$

Step 2.1.23

Multiply $z^{4}$ by $z^{4}$ by adding the exponents.

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Step 2.1.23.1

Move $z^{4}$ .

$3 z^{2} - 2 z^{5} + z^{3} + 4 z^{6} - 7 z - 15 z^{3} + 10 z^{6} - 5 z^{4} - 20 z^{7} + 35 z^{2} + 3 z^{5} - 2 (z^{4} z^{4}) + z^{4} z^{2} + z^{4} (4 z^{5}) + z^{4} \cdot - 7 - 2 (3 z) - 2 (- 2 z^{4}) - 2 z^{2} - 2 (4 z^{5}) - 2 \cdot - 7$

Step 2.1.23.2

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

$3 z^{2} - 2 z^{5} + z^{3} + 4 z^{6} - 7 z - 15 z^{3} + 10 z^{6} - 5 z^{4} - 20 z^{7} + 35 z^{2} + 3 z^{5} - 2 z^{4 + 4} + z^{4} z^{2} + z^{4} (4 z^{5}) + z^{4} \cdot - 7 - 2 (3 z) - 2 (- 2 z^{4}) - 2 z^{2} - 2 (4 z^{5}) - 2 \cdot - 7$

Step 2.1.23.3

Add $4$ and $4$ .

$3 z^{2} - 2 z^{5} + z^{3} + 4 z^{6} - 7 z - 15 z^{3} + 10 z^{6} - 5 z^{4} - 20 z^{7} + 35 z^{2} + 3 z^{5} - 2 z^{8} + z^{4} z^{2} + z^{4} (4 z^{5}) + z^{4} \cdot - 7 - 2 (3 z) - 2 (- 2 z^{4}) - 2 z^{2} - 2 (4 z^{5}) - 2 \cdot - 7$

Step 2.1.24

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

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Step 2.1.24.1

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

$3 z^{2} - 2 z^{5} + z^{3} + 4 z^{6} - 7 z - 15 z^{3} + 10 z^{6} - 5 z^{4} - 20 z^{7} + 35 z^{2} + 3 z^{5} - 2 z^{8} + z^{4 + 2} + z^{4} (4 z^{5}) + z^{4} \cdot - 7 - 2 (3 z) - 2 (- 2 z^{4}) - 2 z^{2} - 2 (4 z^{5}) - 2 \cdot - 7$

Step 2.1.24.2

Add $4$ and $2$ .

$3 z^{2} - 2 z^{5} + z^{3} + 4 z^{6} - 7 z - 15 z^{3} + 10 z^{6} - 5 z^{4} - 20 z^{7} + 35 z^{2} + 3 z^{5} - 2 z^{8} + z^{6} + z^{4} (4 z^{5}) + z^{4} \cdot - 7 - 2 (3 z) - 2 (- 2 z^{4}) - 2 z^{2} - 2 (4 z^{5}) - 2 \cdot - 7$

Step 2.1.25

Rewrite using the commutative property of multiplication.

$3 z^{2} - 2 z^{5} + z^{3} + 4 z^{6} - 7 z - 15 z^{3} + 10 z^{6} - 5 z^{4} - 20 z^{7} + 35 z^{2} + 3 z^{5} - 2 z^{8} + z^{6} + 4 z^{4} z^{5} + z^{4} \cdot - 7 - 2 (3 z) - 2 (- 2 z^{4}) - 2 z^{2} - 2 (4 z^{5}) - 2 \cdot - 7$

Step 2.1.26

Multiply $z^{4}$ by $z^{5}$ by adding the exponents.

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Step 2.1.26.1

Move $z^{5}$ .

$3 z^{2} - 2 z^{5} + z^{3} + 4 z^{6} - 7 z - 15 z^{3} + 10 z^{6} - 5 z^{4} - 20 z^{7} + 35 z^{2} + 3 z^{5} - 2 z^{8} + z^{6} + 4 (z^{5} z^{4}) + z^{4} \cdot - 7 - 2 (3 z) - 2 (- 2 z^{4}) - 2 z^{2} - 2 (4 z^{5}) - 2 \cdot - 7$

Step 2.1.26.2

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

$3 z^{2} - 2 z^{5} + z^{3} + 4 z^{6} - 7 z - 15 z^{3} + 10 z^{6} - 5 z^{4} - 20 z^{7} + 35 z^{2} + 3 z^{5} - 2 z^{8} + z^{6} + 4 z^{5 + 4} + z^{4} \cdot - 7 - 2 (3 z) - 2 (- 2 z^{4}) - 2 z^{2} - 2 (4 z^{5}) - 2 \cdot - 7$

Step 2.1.26.3

Add $5$ and $4$ .

$3 z^{2} - 2 z^{5} + z^{3} + 4 z^{6} - 7 z - 15 z^{3} + 10 z^{6} - 5 z^{4} - 20 z^{7} + 35 z^{2} + 3 z^{5} - 2 z^{8} + z^{6} + 4 z^{9} + z^{4} \cdot - 7 - 2 (3 z) - 2 (- 2 z^{4}) - 2 z^{2} - 2 (4 z^{5}) - 2 \cdot - 7$

Step 2.1.27

Move $- 7$ to the left of $z^{4}$ .

$3 z^{2} - 2 z^{5} + z^{3} + 4 z^{6} - 7 z - 15 z^{3} + 10 z^{6} - 5 z^{4} - 20 z^{7} + 35 z^{2} + 3 z^{5} - 2 z^{8} + z^{6} + 4 z^{9} - 7 \cdot z^{4} - 2 (3 z) - 2 (- 2 z^{4}) - 2 z^{2} - 2 (4 z^{5}) - 2 \cdot - 7$

Step 2.1.28

Multiply $3$ by $- 2$ .

$3 z^{2} - 2 z^{5} + z^{3} + 4 z^{6} - 7 z - 15 z^{3} + 10 z^{6} - 5 z^{4} - 20 z^{7} + 35 z^{2} + 3 z^{5} - 2 z^{8} + z^{6} + 4 z^{9} - 7 z^{4} - 6 z - 2 (- 2 z^{4}) - 2 z^{2} - 2 (4 z^{5}) - 2 \cdot - 7$

Step 2.1.29

Multiply $- 2$ by $- 2$ .

$3 z^{2} - 2 z^{5} + z^{3} + 4 z^{6} - 7 z - 15 z^{3} + 10 z^{6} - 5 z^{4} - 20 z^{7} + 35 z^{2} + 3 z^{5} - 2 z^{8} + z^{6} + 4 z^{9} - 7 z^{4} - 6 z + 4 z^{4} - 2 z^{2} - 2 (4 z^{5}) - 2 \cdot - 7$

Step 2.1.30

Multiply $4$ by $- 2$ .

$3 z^{2} - 2 z^{5} + z^{3} + 4 z^{6} - 7 z - 15 z^{3} + 10 z^{6} - 5 z^{4} - 20 z^{7} + 35 z^{2} + 3 z^{5} - 2 z^{8} + z^{6} + 4 z^{9} - 7 z^{4} - 6 z + 4 z^{4} - 2 z^{2} - 8 z^{5} - 2 \cdot - 7$

Step 2.1.31

Multiply $- 2$ by $- 7$ .

$3 z^{2} - 2 z^{5} + z^{3} + 4 z^{6} - 7 z - 15 z^{3} + 10 z^{6} - 5 z^{4} - 20 z^{7} + 35 z^{2} + 3 z^{5} - 2 z^{8} + z^{6} + 4 z^{9} - 7 z^{4} - 6 z + 4 z^{4} - 2 z^{2} - 8 z^{5} + 14$

Step 2.2

Simplify by adding terms.

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Step 2.2.1

Add $3 z^{2}$ and $35 z^{2}$ .

$- 2 z^{5} + z^{3} + 4 z^{6} - 7 z - 15 z^{3} + 10 z^{6} - 5 z^{4} - 20 z^{7} + 38 z^{2} + 3 z^{5} - 2 z^{8} + z^{6} + 4 z^{9} - 7 z^{4} - 6 z + 4 z^{4} - 2 z^{2} - 8 z^{5} + 14$

Step 2.2.2

Add $- 2 z^{5}$ and $3 z^{5}$ .

$z^{5} + z^{3} + 4 z^{6} - 7 z - 15 z^{3} + 10 z^{6} - 5 z^{4} - 20 z^{7} + 38 z^{2} - 2 z^{8} + z^{6} + 4 z^{9} - 7 z^{4} - 6 z + 4 z^{4} - 2 z^{2} - 8 z^{5} + 14$

Step 2.2.3

Subtract $8 z^{5}$ from $z^{5}$ .

$- 7 z^{5} + z^{3} + 4 z^{6} - 7 z - 15 z^{3} + 10 z^{6} - 5 z^{4} - 20 z^{7} + 38 z^{2} - 2 z^{8} + z^{6} + 4 z^{9} - 7 z^{4} - 6 z + 4 z^{4} - 2 z^{2} + 14$

Step 2.2.4

Subtract $15 z^{3}$ from $z^{3}$ .

$- 7 z^{5} - 14 z^{3} + 4 z^{6} - 7 z + 10 z^{6} - 5 z^{4} - 20 z^{7} + 38 z^{2} - 2 z^{8} + z^{6} + 4 z^{9} - 7 z^{4} - 6 z + 4 z^{4} - 2 z^{2} + 14$

Step 2.2.5

Add $4 z^{6}$ and $10 z^{6}$ .

$- 7 z^{5} - 14 z^{3} + 14 z^{6} - 7 z - 5 z^{4} - 20 z^{7} + 38 z^{2} - 2 z^{8} + z^{6} + 4 z^{9} - 7 z^{4} - 6 z + 4 z^{4} - 2 z^{2} + 14$

Step 2.2.6

Add $14 z^{6}$ and $z^{6}$ .

$- 7 z^{5} - 14 z^{3} + 15 z^{6} - 7 z - 5 z^{4} - 20 z^{7} + 38 z^{2} - 2 z^{8} + 4 z^{9} - 7 z^{4} - 6 z + 4 z^{4} - 2 z^{2} + 14$

Step 2.2.7

Subtract $6 z$ from $- 7 z$ .

$- 7 z^{5} - 14 z^{3} + 15 z^{6} - 5 z^{4} - 20 z^{7} + 38 z^{2} - 2 z^{8} + 4 z^{9} - 7 z^{4} - 13 z + 4 z^{4} - 2 z^{2} + 14$

Step 2.2.8

Subtract $7 z^{4}$ from $- 5 z^{4}$ .

$- 7 z^{5} - 14 z^{3} + 15 z^{6} - 20 z^{7} + 38 z^{2} - 2 z^{8} + 4 z^{9} - 12 z^{4} - 13 z + 4 z^{4} - 2 z^{2} + 14$

Step 2.2.9

Subtract $2 z^{2}$ from $38 z^{2}$ .

$- 7 z^{5} - 14 z^{3} + 15 z^{6} - 20 z^{7} - 2 z^{8} + 4 z^{9} - 12 z^{4} - 13 z + 4 z^{4} + 36 z^{2} + 14$

Step 2.2.10

Add $- 12 z^{4}$ and $4 z^{4}$ .

$- 7 z^{5} - 14 z^{3} + 15 z^{6} - 20 z^{7} - 2 z^{8} + 4 z^{9} - 8 z^{4} - 13 z + 36 z^{2} + 14$

Step 2.2.11

Simplify the expression.

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Step 2.2.11.1

Move $- 13 z$ .

$- 7 z^{5} - 14 z^{3} + 15 z^{6} - 20 z^{7} - 2 z^{8} + 4 z^{9} - 8 z^{4} + 36 z^{2} - 13 z + 14$

Step 2.2.11.2

Move $- 14 z^{3}$ .

$- 7 z^{5} + 15 z^{6} - 20 z^{7} - 2 z^{8} + 4 z^{9} - 8 z^{4} - 14 z^{3} + 36 z^{2} - 13 z + 14$

Step 2.2.11.3

Move $- 7 z^{5}$ .

$15 z^{6} - 20 z^{7} - 2 z^{8} + 4 z^{9} - 7 z^{5} - 8 z^{4} - 14 z^{3} + 36 z^{2} - 13 z + 14$

Step 2.2.11.4

Move $15 z^{6}$ .

$- 20 z^{7} - 2 z^{8} + 4 z^{9} + 15 z^{6} - 7 z^{5} - 8 z^{4} - 14 z^{3} + 36 z^{2} - 13 z + 14$

Step 2.2.11.5

Move $- 20 z^{7}$ .

$- 2 z^{8} + 4 z^{9} - 20 z^{7} + 15 z^{6} - 7 z^{5} - 8 z^{4} - 14 z^{3} + 36 z^{2} - 13 z + 14$

Step 2.2.11.6

Reorder $- 2 z^{8}$ and $4 z^{9}$ .

$4 z^{9} - 2 z^{8} - 20 z^{7} + 15 z^{6} - 7 z^{5} - 8 z^{4} - 14 z^{3} + 36 z^{2} - 13 z + 14$