Evaluate (7x^2y^2+12xy^2-3x^2y+11)+(4xy-13x^2y+7)

$(7 x^{2} y^{2} + 12 x y^{2} - 3 x^{2} y + 11) + (4 x y - 13 x^{2} y + 7)$

Remove parentheses.

$7 x^{2} y^{2} + 12 x y^{2} - 3 x^{2} y + 11 + 4 x y - 13 x^{2} y + 7$

Subtract $13 x^{2} y$ from $- 3 x^{2} y$ .

$7 x^{2} y^{2} + 12 x y^{2} - 16 x^{2} y + 11 + 4 x y + 7$

Add $11$ and $7$ .

$7 x^{2} y^{2} + 12 x y^{2} - 16 x^{2} y + 4 x y + 18$