题目因式分解:(1)2(x2+6x+1)2+5(x2+6x+1)(x2+1)+2(x2+1)2(1)2(x^{2}+6x+1)^{2}+5(x^{2}+6x+1)(x^{2}+1)+2(x^{2}+1)^{2}(1)2(x2+6x+1)2+5(x2+6x+1)(x2+1)+2(x2+1)2；(2)x2(y−z)3+y2(z−x)3+z2(x−y)3(2)x^{2}(y-z)^{3}+y^{2}(z-x)^{3}+z^{2}(x-y)^{3}(2)x2(y−z)3+y2(z−x)3+z2(x−y)3.知识点：分组分解法章节：数与式 / 因式分解
