$\lim_{x\to-2}\left(\frac{x^2-9}{x^2-3}\right)$
$m^2+18m+66$
$40x^2+94x-15$
$ni\:sin\left(60\right)\:=\:nr\:sin\left(40\right)$
$\sqrt{5\sqrt{y^{17}}}$
$\lim_{x\to0}\left(\frac{\left(x^2e^{2x}\right)}{ln\left(x^4\right)}\right)$
$\frac{18\sqrt{u}-18}{4u-4}$
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