(x+y)^2(x-y)+(x+y)(y-x)^2
=(x+y)(x-y)(x+y+x-y)
=2x(x+y)(x-y)详细，可以吗，(x+y)^2(x-y)+(x+y)(y-x)^2 =(x+y)^2(x-y)+(x+y)(x-y)^2 =(x+y)(x-y)(x+y+x-y)=2x(x+y)(x-y) 提(x+y)(x-y)就可以