化简:2(3x-y)-3(x+7y)
化简:(x-3y)(x+y)-(x-2y)(x+2y)-(x-y)平方
化简:2(3x-y)-3(x+7y)
化简,亲快啊啊急!(3x-2y)(7x-y)-(4x+3y)(x-y)
化简(x-3y)(3x+y)-(2x-3y)(2x-3y)
(2x+3y)(3x-2y)-(x-2y)(x+2y)化简
化简 3(X-Y)²-4(X-Y)+7(X-Y)-6(X-Y)²
化简:[(x+2y)^2-(x+y)(3x-y)-5y^2]/2x
-(5x+y)-3(2x-3y)(化简)
(-3x+7y)(-7y-3x)-(x-3y)(2x+3y)
化简(x-y)^3乘以(y-x)^2为
(x-y)(x-2y)-(3x-2y)(x-3y)
1.((y+2x)(-2x+y)+4(x+2y)^2)/3y 2.(2(x-y)^3-8(x-y)^2(x+y)+6y(