Find the product
(t21)(t18+t16+t14+t12+t10+t8+t6+t4+t2+1)\displaystyle {\left({t}^{{2}}-{1}\right)}{\left({t}^{{18}}+{t}^{{16}}+{t}^{{14}}+{t}^{{12}}+{t}^{{10}}+{t}^{{8}}+{t}^{{6}}+{t}^{{4}}+{t}^{{2}}+{1}\right)}


Ans =