$\left(x+4\right)x\left(x-4\right)$
$\cot\left(x\right)^2=7$
$-27-\left[-5+\left(-9+8\right)\right]$
$\left(x^3+125\right)+\left(x^1+5\right)$
$\frac{d}{dx}\left(\frac{x^4+3x^2+x}{\ln\left(x\right)}\right)$
$9a+15a^2+54a+20a^2-15a^3$
$\int\frac{e^{2x}-2}{e^{2x}}dx$
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