$$\frac{ 512 { x }^{ 9 } + { y }^{ 9 } }{ 2x+y }$$
$\left(4x^{2}-2xy+y^{2}\right)\left(64x^{6}+y^{6}-8\left(xy\right)^{3}\right)$
$\frac{512x^{9}+y^{9}}{2x+y}$
