化简:2-【2(x+3y)-3(x-2y)】
化简:(x-3y)(x+y)-(x-2y)(x+2y)-(x-y)平方
(2x+3y)(3x-2y)-(x-2y)(x+2y)化简
化简(x-3y)(3x+y)-(2x-3y)(2x-3y)
化简:[(x+2y)^2-(x+y)(3x-y)-5y^2]/2x
【x-3y][x+y]-[x-2y][x +2y]-[x-y
[(3x+y)(x-y)-(2x+3y)(x-y)]*(x-y)
1.((y+2x)(-2x+y)+4(x+2y)^2)/3y 2.(2(x-y)^3-8(x-y)^2(x+y)+6y(
(x-y)(x-2y)-(3x-2y)(x-3y)
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)+【-
化简:{2/3x-2/(x+y)[(x+y)/3x-x-y]}/【(x-y)/x】的负二次方
化简:x-y/x+3y÷x^-y^2/x^2+6xy+9y^2-(xy/x+y)
化简:2(3x-y)-3(x+7y)