$83x-20y=590$
$\:\lim\:_{x\to\:\:3}\left(\frac{x^3-3x^2+2x-6}{2x-4}\right)$
$\left(\:3m\:+2y\right)^2$
$-3x+7y=5x+2y$
$\frac{3x^2-x-2}{3x+2}$
$\left(x-6\right)\left(4x+3\right)$
$\int\frac{2x+1}{\left(x^2+4\right)^3}dx$
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