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