$\lim_{x\to1}\left(\frac{cos\left(\pi\:x\right)+x^2}{lnx-2x+2}\right)$
$7z^2+42=149z$
$\left(2ab-a\right)\left(1-2b\right)$
$\int_2^5\left(3x^2+2x+1\right)dx$
$\frac{x^2+3x+2}{x-1}$
$\frac{x+2}{2x+6}\:+\frac{8}{x+5}$
$\lim_{x\to0}\left(\frac{3\left(e^x-e^{-x}\right)}{x^1}\right)$
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