$\frac{3x^2+27x+47}{x+7}$
$4\cos^21-3$
$\frac{15x^3y}{5x^2y}$
$\left(\frac{2}{3}m+\frac{1}{2}n\right)^2$
$\lim_{f\to-7}\left(\frac{f^2+4f-21}{f+7}\right)$
$27n-9m$
$\lim_{x\to0}2\tan\left(x\right)\ln\left(x\right)$
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