$\frac{d^2}{dx^2}\left(4x^2\:+\:6x\:-\:12\right)$
$\left(27x^{3a}y^{6b}z^{12c}\right)^{\frac{1}{3}}$
$34-\left(-9\right)-42-5$
$2x:x^2$
$\lim_{x\to-2}\left(\frac{sin\left(x+2\right)}{2\left(x^2-2x-12\right)}\right)$
$xy+x=2$
$\lim_{x\to0}\left(-3+n^2\right)$
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