$\lim_{x\to0}\left(\frac{2n}{\sqrt{n^2+1}}\right)$
$x^2+2x+4=7$
$4x-24\le x+6$
$x^3+2x^2-11x-12$
$\frac{dy}{dx}=\frac{-\left(3z+1\right)}{2z^2}$
$41^2$
$\int\:\frac{10x-2}{x^2-14x+48}dx$
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