$\frac{cot^2x+8cotx+16}{cosx\:cotx+4cosx}$
$\frac{1}{3}\cdot12$
$\int\frac{2}{\left(16x^2+9\right)}dx$
$3\left(a+b\right)c^2$
$\int\left(x^4\left(x^2-2\right)^2\right)dx$
$\lim_{x\to0}\left(\frac{e-\left(1+x\right)^{\frac{1}{x}}\cdot x}{x}\right)$
$2x+2=17+x$
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