Упростите выражение (x-y/x-y-x/y):x+y/xy

Question

Упростите выражение
(x-y/x-y-x/y):x+y/xy

Answer 1

(x-y/x-y-x/y):x+y/xy=x^2y-y^2-xy^2-x^2/xy•1/x+1/x=x^2y-y^2-xy^2-x^2/x^2y+1/x=x^2y-y^2-xy^2-x^2+xy/x^2y