化简(x2+3y)(x-2y)-(y+2x)(2x-y)

化简:(x-3y)(x+y)-(x-2y)(x+2y)-(x-y)平方 化简(2x+y)(2x-y)+(x+y)2次方-2(2x2次方-xy) 【x-3y][x+y]-[x-2y][x +2y]-[x-y [(3x+y)(x-y)-(2x+3y)(x-y)]*(x-y) 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)+【- (2x+3y)(3x-2y)-(x-2y)(x+2y)化简 化简：[(x+2y)^2-(x+y)(3x-y)-5y^2]/2x 化简(x-3y)(3x+y)-(2x-3y)(2x-3y) 化简：（2x-y)²-4(x-y)(x+y) 1、x(x-y)(x+y)-x(x+y)^2 计算(x+y)(x+y)^2(-x-y)^3 数学(x-y)^5*(y-x)^3*(x-y)^2