/ 2 \ | 1 (x + y) - 4*x*y| 4 |-------- - ----------------|*x | 2 2 | |/ x \ x - x*y | ||-----| | \\y - x/ / -------------------------------- 2 2 4 x *y - y
/ 2 2 \ 4 |(y - x) - (x + y) + 4*x*y| x *|-------- + ------------------| | 2 2 | \ x x - x*y / ---------------------------------- 4 2 2 - y + x *y
/ 2 2 \ 4 |(y - x) (x + y) - 4*x*y| x *|-------- - ----------------| | 2 2 | \ x x - x*y / -------------------------------- 4 2 2 - y + x *y
x^4*((y - x)^2/x^2 - ((x + y)^2 - 4.0*x*y)/(x^2 - x*y))/(-y^4 + x^2*y^2)
2 / 2 / 2 \ 2 / 2 \\ x *\x *\- (x + y) + 4*x*y/ + (y - x) *\x - x*y// -------------------------------------------------- / 2 \ / 4 2 2\ \x - x*y/*\- y + x *y /
2 / 2 / 2 \\ x *\(y - x) *(x - y) - x*\(x + y) - 4*x*y// -------------------------------------------- 2 / 2 2\ y *(x - y)*\x - y /
/ 2 2 \ 4 |(y - x) (x + y) - 4*x*y| x *|-------- - ----------------| | 2 2 | \ x x - x*y / -------------------------------- 4 2 2 - y + x *y