(a加b加c)的立方+(b减a减c)的立方+(c减a减b)的立方+（a减b减c）的立方,因式分解,谢

[(a+b+c)³+(b-a-c)³]+[(c-a-b)³+(a-b-c)³]＝2b[(a+b+c)²+(a+b+c)(a-b+c)+(a-b+c)²]－2b[(a+b-c)²＋(a+b-c)(a-b-c)+(a-b-c)²]=2b[(a+b+c)²+(a+b+c)(a-b+c)+(a-b+c)...