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) 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) 计算(x+y)(x+y)^2(-x-y)^3 数学(x-y)^5*(y-x)^3*(x-y)^2 化简[(3x+4y)^2-(2x+y)(2x-y)+(-x+y)(5x-y)]除以-2y,其中x=-1,y=1