$\lim_{r\to0}\left(\frac{\left(r+1\right)}{k}\right)\ln\left(\frac{d+rc}{\left(r+1\right)c}\right)$
$36v^2-100$
$\int\:\frac{x^2-3x+2}{x^2-9}dx$
$x+y=2z-3y$
$17-\left(-5\right)$
$-4-x=-13$
$15\left(2x-1\right)>2+5\left(x+1\right)$
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