$\sin2x\cos x$
$\frac{3}{5}x\left(\frac{2}{9}x^4\right)$
$\frac{d}{dx}\left(x^x\right)tan^{-1}2x$
$\left(3z^2\:+5y\right)\left(3z^2\:-5y\:\right)$
$\frac{1}{x\sqrt{x+1}}-\frac{1}{x}$
$-654\cdot90$
$\left(12n-6\right)\left(12n+6\right)$
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