2 2 x + 9*y 6*x*y --------- + ------- x - 3*y 3*y - x
(x^2 + 9.0*y^2)/(x - 3.0*y) + 6.0*x*y/(-x + 3.0*y)
/ 2 2\ \x + 9*y /*(-x + 3*y) + 6*x*y*(x - 3*y) ---------------------------------------- (x - 3*y)*(-x + 3*y)
/ 2 2\ \x + 9*y /*(-x + 3*y) + 6*x*y*(x - 3*y) ---------------------------------------- (x - 3*y)*(-x + 3*y)