2 2 16 + 9*y - 25*x - 24*y
16 + 9*y^2 - 25*x^2 - 24*y
/ 4 3*y\ / 4 3*y\ 1*|x + - - + ---|*|x + - - ---| \ 5 5 / \ 5 5 /
(1*(x - (4/5 + 3*y/5)))*(x + (4/5 - 3*y/5))
16.0 + 9.0*y^2 - 24.0*y - 25.0*x^2
-(-4 + 3*y + 5*x)*(4 - 3*y + 5*x)