$\left(-3z^2-6\right)+2+4z$
$-13\:+\:\left(11\right)\:+\:16\:+\:\left(-27\right)\:+\:\left(-7\right)-\:21$
$\lim_{x\to0}\left(\frac{x^2+x}{4+\sin\left(x\right)}\right)$
$\int\frac{z-3}{z\left(z+1\right)}dx$
$\int e^{5x}\cos\left(3x\right)dx$
$\frac{10x}{5x}$
$49\:y^8+140\:y^4\:y^4\:+100\:z^8$
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