((x y) ((x y) * (x y))) ((x y) * (x y))

请输入您的数学问题…… ((x y) - ((x y) * (x - y))) ((x y) * (x - y))

问题

((x y) - ((x y) * (x - y))) ((x y) * (x - y))

Verification required

Please type the verification code shown