$n^2-6n+36$
$2\sin^2x-\tan x=0$
$\lim_{x\to\infty}\left(2+e\left(x\right)\right)e^x$
$2x^2+11x-6$
$\lim_{x\to\infty}\left(\frac{2x+1}{2x-1}\right)^{4x}$
$\int_{-2}^12xdx$
$2x-18+-6x-2$
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