$\:\left(5\:-\:x^2\right)^3$
$x^4+125x$
$\left(2tanx-2cotx\right)\left(3tan^2x+3cot^2+3\right)$
$\frac{d}{dx}xe^{2x+1}$
$24m^2+24mn+4n^2$
$3\left(x+2\right)\left(x+3\right)=60$
$\frac{1}{2}x-8=\frac{1}{4}x-6$
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