Simplify 9z+8zy^2-5z+zy^2-15xy^2

$9 z + 8 z y^{2} - 5 z + z y^{2} - 15 x y^{2}$

Subtract $5 z$ from $9 z$ .

$8 z y^{2} + 4 z + z y^{2} - 15 x y^{2}$

Add $8 z y^{2}$ and $z y^{2}$ .

$9 z y^{2} + 4 z - 15 x y^{2}$

Simplify the expression.

Move $z$ .

$9 y^{2} z + 4 z - 15 x y^{2}$

Move $4 z$ .

$9 y^{2} z - 15 x y^{2} + 4 z$

Reorder $9 y^{2} z$ and $- 15 x y^{2}$ .

$- 15 x y^{2} + 9 y^{2} z + 4 z$

$- 15 x y^{2} + 9 y^{2} z + 4 z$

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