$5\:\frac{5}{6}+7\:\frac{5}{6}$
$\int\frac{x}{\left(x^2-4x\right)}dx$
$\frac{8}{x}=\sqrt{\frac{64}{x^2}}$
$\lim\:_{x\to\:\pi\:}\left(\frac{\:x}{cos\left(x\right)}+\frac{2x-\pi\:2}{\sin\:\left(x-\pi\:\right)}\right)$
$13.75+2.75$
$\frac{x^{18}-1}{x^2+1}$
$-20x-8$
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