Simplify (-9xy^3-9x^4y^3)+(3xy^3+7y^4-8x^4y^4)+(3x^4y^3+2xy^3)

$(- 9 x y^{3} - 9 x^{4} y^{3}) + (3 x y^{3} + 7 y^{4} - 8 x^{4} y^{4}) + (3 x^{4} y^{3} + 2 x y^{3})$

Step 1

Remove parentheses.

$- 9 x y^{3} - 9 x^{4} y^{3} + 3 x y^{3} + 7 y^{4} - 8 x^{4} y^{4} + 3 x^{4} y^{3} + 2 x y^{3}$

Step 2

Add $- 9 x y^{3}$ and $3 x y^{3}$ .

$- 6 x y^{3} - 9 x^{4} y^{3} + 7 y^{4} - 8 x^{4} y^{4} + 3 x^{4} y^{3} + 2 x y^{3}$

Step 3

Add $- 6 x y^{3}$ and $2 x y^{3}$ .

$- 9 x^{4} y^{3} + 7 y^{4} - 8 x^{4} y^{4} + 3 x^{4} y^{3} - 4 x y^{3}$

Step 4

Add $- 9 x^{4} y^{3}$ and $3 x^{4} y^{3}$ .

$7 y^{4} - 8 x^{4} y^{4} - 6 x^{4} y^{3} - 4 x y^{3}$