Multiplying Polynomials with Different Variables - Examples & Practice

$-x^2y$ & $2x^2y$ and $2xy^2$ & $xy^2$

$2x^3$ and $-2y^3$

$4xy^2$ & $-x^2y$ and $x^2y$ & $xy^2$

$-x^2y$ & $2x^2y$ and $4xy^2$ & $-xy^2$