2 2 9*x - 64*y
9*x^2 - 64*y^2
/ 8*y\ / 8*y\ 1*|x + ---|*|x - ---| \ 3 / \ 3 /
(1*(x + 8*y/3))*(x - 8*y/3)
9.0*x^2 - 64.0*y^2
(-8*y + 3*x)*(3*x + 8*y)