Find the product
(b21)(b14+b12+b10+b8+b6+b4+b2+1)\displaystyle {\left({b}^{{2}}-{1}\right)}{\left({b}^{{14}}+{b}^{{12}}+{b}^{{10}}+{b}^{{8}}+{b}^{{6}}+{b}^{{4}}+{b}^{{2}}+{1}\right)}


Ans =