3 - y x - 3 -------- + -------- 2 2 y - x*y x*y - x
(3.0 - y)/(y^2 - x*y) + (-3.0 + x)/(-x^2 + x*y)
/ 2 \ / 2 \ (-3 + x)*\y - x*y/ + (3 - y)*\- x + x*y/ ------------------------------------------ / 2 \ / 2 \ \y - x*y/*\- x + x*y/
x*(3 - y) + y*(-3 + x) ---------------------- x*y*(y - x)