Simplify (-12az^2-2z^3)+(-2a^3+7a^2z)-(-4a^2z+8az^2)

$(- 12 a z^{2} - 2 z^{3}) + (- 2 a^{3} + 7 a^{2} z) - (- 4 a^{2} z + 8 a z^{2})$

Step 1

Remove parentheses.

$- 12 a z^{2} - 2 z^{3} - 2 a^{3} + 7 a^{2} z - (- 4 a^{2} z + 8 a z^{2})$

Step 2

Simplify each term.

Apply the distributive property.

$- 12 a z^{2} - 2 z^{3} - 2 a^{3} + 7 a^{2} z - (- 4 a^{2} z) - (8 a z^{2})$

Multiply $- 4$ by $- 1$ .

$- 12 a z^{2} - 2 z^{3} - 2 a^{3} + 7 a^{2} z + 4 (a^{2} z) - (8 a z^{2})$

Multiply $8$ by $- 1$ .

$- 12 a z^{2} - 2 z^{3} - 2 a^{3} + 7 a^{2} z + 4 (a^{2} z) - 8 (a z^{2})$

Remove parentheses.

$- 12 a z^{2} - 2 z^{3} - 2 a^{3} + 7 a^{2} z + 4 a^{2} z - 8 a z^{2}$

Step 3

Simplify by adding terms.

Subtract $8 a z^{2}$ from $- 12 a z^{2}$ .

$- 2 z^{3} - 2 a^{3} + 7 a^{2} z + 4 a^{2} z - 20 a z^{2}$

Add $7 a^{2} z$ and $4 a^{2} z$ .

$- 2 z^{3} - 2 a^{3} + 11 a^{2} z - 20 a z^{2}$

Move $- 2 z^{3}$ .

$- 2 a^{3} + 11 a^{2} z - 20 a z^{2} - 2 z^{3}$