$\frac{d}{dx}ze^{yz}+2xe^{xz}-4e^{xy}=3$
$\int\frac{5x^3+x+36}{x^3+9x}dx$
$\lim_{x\to-2}\left(\frac{2x^2+3x-20}{x^2+7x+10}\right)$
$ax+ay+x+y$
$2\sin\left(x\right)+2cos\left(x\right)=\sqrt{2}$
$n+6<28$
$\frac{x^2-x-2}{x+2}$
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