$6n+15n^2$
$-10x^2+1760x-50000$
$y'+10xy=3x$
$\int28xe^{-2x}dx$
$\left(2+i\right)\left(4+2i\right)$
$\lim_{x\to-1}\left(\frac{x+1}{\sqrt{x-5\:}-2}\right)$
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