计算(2x+y)(x-y)-(2x+y)(y-2x)+(2x^2y-y)^2/(-y^2)
计算:(x-y)^2*(y-x)^2*(x-y)^6
计算(x+y)(x+y)^2(-x-y)^3
有这样一道题:"计算(2*x*x*x-3*x*x*y-2*x*y*y)-(x*x*x-2*x*y*y+y*y*y)+【-
计算:(-x-2y) * (3x-y)
1、x(x-y)(x+y)-x(x+y)^2
[(-x-y)(-x+y)-(x+y)^2-x(y-y^2)}÷1/2y
(1)(x^2/x)-y-x-y
【(x-y)^2+(x+y)(x-y)】除以 2x
x^2-y^2/x+y-4x(x-y)+y^2/2x-y,
(x+y)^2(x-y)^2-(x-y)(x+y)(x^2+y^2)分解因式
化简:(x-3y)(x+y)-(x-2y)(x+2y)-(x-y)平方
【x-3y][x+y]-[x-2y][x +2y]-[x-y