$\frac{1}{\left(s+6\right)\left(s-4\right)}+\frac{2}{s+6}$

$\frac{3+6^n}{6^n}$

$\int\frac{7}{1+z^2}dx$

$\frac{x^5-x^3+1}{x^3+2x^2}$

$\lim_{x\to0}\left(\frac{10^x}{e^x}\right)$

$\sqrt{2+7}$

$\frac{dl}{dt}=\:\left(3.5\right)\left(s\right)\:\left(-.78\right)\left(1\right)$