$$(3x^{2}y-5xy^{2})hy(\frac{1}{5}x^{2}+\frac{1}{3}y^{2})$$
$\frac{hx\left(3x-5y\right)y^{2}\left(3x^{2}+5y^{2}\right)}{15}$
$-h\left(xy\right)^{3}+hx^{2}y^{4}+\frac{3hy^{2}x^{4}}{5}-\frac{5hxy^{5}}{3}$
