化简(4x-2y)-﹛5x-[8y-2x-(x+y)]-x﹜
化简:(2x-y)²-4(x-y)(x+y)
计算(x^8-x^7y+x^5y^3-x^4y^4+x^3y^5-x^y^7+y^8)(x^2+xy+y^2)
x^8-x^7y+x^6y^2-x^5y^3+x^4y^4-x^3y^5+x^2y^-xy^7+y^8
1、x(x-y)(x+y)-x(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
化简:(x-3y)(x+y)-(x-2y)(x+2y)-(x-y)平方
x^2-y^2/x+y-4x(x-y)+y^2/2x-y,
1) (2x+5y)(2x-5y)(-4x^2-25y^2) 2) [(x+y)(x-y)-(x-y)^2+2y(x-y
化简2(2X-7Y)(7Y+2X)+X^2-(-4X+5Y)(-5Y-4X)
化简:[(x+2y)^2-(x+y)(3x-y)-5y^2]/2x
化简:{(x+2y)(2y-x)-4y(-x+y) } / (-2x)
(x+2)(x+3) (x-4)(x+1) (y+4)(y-2) (y-5)(y-3)