3x(x2+1)(x+1)(x-1)（x-2y+1）(x-2y-1)x(x2+1)(x+1)(x-1)(x-1)(x2+x+1)
1、3X2(x-1)(x2+x+1)2、（x-2y)的平方-13、x(x2+1)(x2-1)4、(x-1)(x2+x+1)看的懂吧
