(a²-b²)(a²+ab+b²)(a²-ab+b²)计算
问题描述：
(a²-b²)(a²+ab+b²)(a²-ab+b²)计算
（a+1）（a²-a+1）=a³+1
(a-2)(a²+2a+4)=a³-8
答
(a²-b²)(a²+ab+b²)(a²-ab+b²)=(a-b)(a+b)(a²+ab+b²)(a²-ab+b²)=(a³-b³)(a³+b³)=a^6-b^6（a+1）（a²-a+1）=a³+1(a-2)(a²+2a+...