[4x-(2x-y)]/(2x+y)(2x-y)怎么去分母?

1、x(x-y)(x+y)-x(x+y)^2 x^2-y^2/x+y-4x(x-y)+y^2/2x-y, 3x-【(y-x)-2x-y】 去括号, 2xy/(x+y)(x+y)与x/(x+y)(x-y)怎么通分 (2x-y)^2-4(x-y)(x+2y) (2x-y)²-4(x-y)(x+2y) 化简：（2x-y)²-4(x-y)(x+y) (1)(x^2/x)-y-x-y x/x-y*y^2/x+y-x^3y2/x^4-y^4/x^2/x^2+y^2 x+2y+4y^2/x-y+4x^y/4y^2-x^2 4x(y-x)-y^2因式分解 (x+3y-4)(2x-y)