化简：3x-5y-〔-2y+3（5y-2x）〕要过程

化简:5(x-y)+2(x+y)-3(x-y) 化简：[(x+2y)^2-(x+y)(3x-y)-5y^2]/2x 化简:3(x-y)²-7(x-y)+ 2(x-y)²+5(x-y) 整体去括号；化简[5(x-y)-3(x-y)-(x-y)+2(x-y)]-2(x-y) 整体去括号；[5(x-y)-3(x-y)-(x-y)+2(x-y)]-2(x-y)化简 化简[(3x+4y)^2-(2x+y)(2x-y)+(-x+y)(5x-y)]除以-2y,其中x=-1,y=1 已知x-y/x+y=3,求代数式5(x-y)/x+y-x+y/2(x-y) [2(x-y)^5-8(x-y)^2(x+y)+6y(x-y)^2]÷2(x-y)^2[2(x-y)^3-8(x-y)^2(x+y)+6y(x-y)^2]÷2(x-y)^2 (2x-3y)-(5x-y) (2X-3y)-(5x-y) (2x-5y)(3x+y) 因式分解(x-2y)(x-3y)+(x-4y)(x-5y)+（x-3y)(x-5y)+(x-2y)(x-4y) (2x+y)²+(x+3y)(x-3y)-x(5x+8y)因式分解 (3x-y)的平方-(2x+y)的平方-5(x-y),化简(3x-y)的平方-(2x+y)的平方-5(x-y)化简 化简(x+y)-(2x+y/2)-(3x+y/6)-(4x+y/12)-(5x+y/20)-……-(10x+y/90) 化简5y-x/x²-y²-3x-4y/y²-x²-x+2y/x²-y². 化简:(x-3y)(x+y)-(x-2y)(x+2y)-(x-y)平方 (5x+2y)(5x-2y)-(3x+2y)(3x-2y)