（3a^3/X+Y)^3*(X^2-Y^2)除以（Y-X/Y+X)^2

(2x+y)(2x-3y)+x(2y+y) 2a(x-y)-4b(x-y) 因式分解 (1)6(x-y)^3-3y(y-x)^2 (2)x(x-y)(a-b)-y(y-x)( 化简[(3x+4y)^2-(2x+y)(2x-y)+(-x+y)(5x-y)]除以-2y,其中x=-1,y=1 【(x-y)^2+(x+y)(x-y)】除以 2x [(3x+y)(x-y)-(2x+3y)(x-y)]*(x-y) 化简:(x-3y)(x+y)-(x-2y)(x+2y)-(x-y)平方 【x-3y][x+y]-[x-2y][x +2y]-[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)+【- [x(x^2y^2-xy)-y(x^2-x^3y)]除以3x^2y [(3x+2y)(3x-2y)-(x+2y)(5x-2y)]除以4x [(5x+2y)(3x+2y)+(x+2y)(x-2y)]除以4x 化简:【(x-y)的2次方+(x+y)(x-y)】除以2x,其中x=3,y=1.5