x^2-y^2/x+y-4x(x-y)+y^2/2x-y,

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x^2-y^2/x+y-4x(x-y)+y^2/2x-y,
过程有就OK

(x^2-y^2)/(x+y)-(4x(x-y)+y^2)/(2x-y)
=(x-y)(x+y)/(x+y)-(4x^2-4xy+y^2)/(2x-y)
=(x-y)-(2x-y)^2/(2x-y)
=(x-y)-(2x-y)
=-x

1、x(x-y)(x+y)-x(x+y)^2 x^2-y^2/x+y-4x(x-y)+y^2/2x-y, (2x-y)^2-4(x-y)(x+2y) (1)(x^2/x)-y-x-y (2x-y)²-4(x-y)(x+2y) 化简：（2x-y)²-4(x-y)(x+y) 【(x-y)^2+(x+y)(x-y)】除以 2x {(z+y)(x-y)-(x-y)的2次方+2y(x-y)}除以4y 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) x/x-y*y^2/x+y-x^3y2/x^4-y^4/x^2/x^2+y^2