$100n^2-10n-20$
$\left(-3\right)-\left(-16\right):\left(-8\right)$
$f\left(x\right)=x^2\sin\left(x\right)+2x\cos\left(x\right)$
$x ^ { \frac { x } { x } }$
$2\:+7$
$\frac{d}{dx}\left(x+2\right)^8\left(x^2+e\right)^6$
$\int\left(\frac{e^2}{\sqrt{1-e^{2x}}}\right)dx$
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