$\left(x+x^2\right)^2$
$\sqrt{2^{9^{4^{-2^{-1}}}}}$
$\sin\left(2a\right)-sin\left(a\right)=0$
$\sqrt{98x^3}$
$\left(4x+3\right)\left(2x-9\right)$
$4sen2xcos2x$
$4x^3-110x^2+600x$
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