The coefficient of \( x^{12} \) in the expansion of
\( \left(1-x^{2}+x^{4}\right)^{3}(1-x)^{7} \....
The coefficient of \( x^{12} \) in the expansion of
\( \mathrm{P} \)
\( \left(1-x^{2}+x^{4}\right)^{3}(1-x)^{7} \) is
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