$\left(c+6d\right)^2$
$\lim_{x\to-2}\left(\frac{\sqrt{x+7}-\sqrt{-x^2+9}}{4x^3+32}\right)$
$6amx\:+6bmx\:+3amy\:+3bmy$
$\left(\frac{5b^{-2}n^4}{n^6z^{-3}}\right)^{-1}$
$\frac{8-1}{2}y$
$64y^2+56y$
$y^2+5y+6$
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