$16-5c+7c+3$
$m^2-32m+256$
$x^2+6x+\frac{36}{4}$
$\lim_{x\to-2}\left(\frac{4x+2}{2x+4}\right)$
$\lim_{x\to0}\left(\left(\frac{x^2+2x-1}{3x^2}\right)\right)$
$\left(4x-\:3y\right)^2-\left(6x-2y\right)^2$
$\left(2yz^3-4z^2\right)^3$
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