Evaluate
2a\left(a+1\right)^{5}\left(a^{2}+1\right)^{10}
Expand
2a^{26}+10a^{25}+40a^{24}+120a^{23}+300a^{22}+652a^{21}+1240a^{20}+2120a^{19}+3270a^{18}+4590a^{17}+5904a^{16}+6960a^{15}+7560a^{14}+7560a^{13}+6960a^{12}+5904a^{11}+4590a^{10}+3270a^{9}+2120a^{8}+1240a^{7}+652a^{6}+300a^{5}+120a^{4}+40a^{3}+10a^{2}+2a
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