题目计算:(1)16(2a+1)(2a−1)(a4+116)(4a2+1)(1)16(2a+1)(2a-1)(a^4+\frac{1}{16})(4a^2+1)(1)16(2a+1)(2a−1)(a4+161)(4a2+1)；(2)x−1−3y−1x−2−x−1y−1−6y−2(2)\frac{x^{-1}-3y^{-1}}{x^{-2}-x^{-1}y^{-1}-6y^{-2}}(2)x−2−x−1y−1−6y−2x−1−3y−1.知识点：整式的混合运算章节：未标注
