[(-2y+x)(x+2y)-(x-2y)^2+8y*(x+y)]/4x

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 1.（（y+2x)(-2x+y)+4(x+2y)^2)/3y 2.（2(x-y)^3-8(x-y）^2(x+y)+6y( 4x(y-x)-y^2因式分解 (x+3y-4)(2x-y)