化简（-3x+y)+(4x-3y)

（y-x)+x(x-y)^3-(y-x)^4 因式分解 （x+y）^6/(x+y)^4-(x-y)^5/(x-y)^3 化简 .. -4(x-y)平方-(x-y)+3(y-x)+6(y-x)平方 化简 化简3x-2/(x+y)[(x+y)/3x-x-y]÷(x-y)/x 化简：{2/3x-2/(x+y)[(x+y)/3x-x-y]}/(x+y)/x 化简:(x-3y)(x+y)-(x-2y)(x+2y)-(x-y)平方 计算 3x+4y/x-y+3y/y-x-4x/x-y 3x+4y/x-y +3y/y-x -4x/x-y x(4y-x)(x-3y)+y(3y-x)(x-4y)因式分解 化简：2x-{-3y+[4x-(3x-y]} 化简[(3x+4y)^2-(2x+y)(2x-y)+(-x+y)(5x-y)]除以-2y,其中x=-1,y=1 1/(x-y)+1/(x+y)+2x/(x^2+y^2)+4x^3/(x^4+y^4)化简 化简:5(x-y)+2(x+y)-3(x-y) 化简3(x-y)-7(x--y)+2(y-x) 化简 3(X-Y)²-4(X-Y)+7(X-Y)-6(X-Y)²3(X-Y)²-4(X-Y)+7(X-Y)-6(X-Y)²(X-Y)视为整体 (x+y)-(x-y)^3÷(x-y)(x+y)×2y化简e , (x-y) (x-2y)+(x+2y) (x-3y)-2(x-3y) (x-4y)= (3x-y)(3y+x)-(x-y)(x+y)