Evaluate
\left(2-x\right)^{7}\left(x-1\right)^{8}
Expand
128-1472x+7840x^{2}-25648x^{3}+57624x^{4}-94164x^{5}+115598x^{6}-108545x^{7}+78592x^{8}-43876x^{9}+18732x^{10}-6006x^{11}+1400x^{12}-224x^{13}+22x^{14}-x^{15}
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