(x+y)(x^2+y^2)(x-y)(x^4+x^4)=?
问题描述：
(x+y)(x^2+y^2)(x-y)(x^4+x^4)=?
答
(x+y)(x^2+y^2)(x-y)(x^4+x^4)
=(x+y)(x-y)(x^2+y^2)(x^4+x^4)
=(x^2-y^2)(x^2+y^2)(x^4+x^4)
=(x^4-y^4)(x^4+y^4)
=x^8-y^8