Answer
$x^3y^3+x^2y^2-xy+15$.
Work Step by Step
The given expression is
$=(xy+3)(x^2y^2-2xy+5)$
Multiply the right side bracket by each term of the left side bracket.
$=xy(x^2y^2-2xy+5)+3(x^2y^2-2xy+5)$
Clear the parentheses.
$=x^3y^3-2x^2y^2+5xy+3x^2y^2-6xy+15$
Add like terms.
$=x^3y^3+x^2y^2-xy+15$.
