$$\frac{x^{3}y^{2}-x^{2}y^{3}}{4x^{2}y+6xy^{2}}\times\frac{4x^{2}-9y^{2}}{x^{2}-y^{2}}$$
$\frac{xy\left(2x-3y\right)}{2\left(x+y\right)}$
$-\frac{3xy^{2}-2yx^{2}}{2\left(x+y\right)}$
