Expand
a^{14}+3003a^{6}b^{8}-2002a^{5}b^{9}+1001a^{4}b^{10}-364a^{3}b^{11}+91a^{2}b^{12}-14ab^{13}+b^{14}+3003b^{6}a^{8}-2002b^{5}a^{9}+1001b^{4}a^{10}-364b^{3}a^{11}+91b^{2}a^{12}-14ba^{13}-3432\left(ab\right)^{7}
Evaluate
\left(a-b\right)^{14}
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