$\frac{cotx+tanx}{cotx-tanx}$
$\frac{x^3-7x^2+8x-2}{x-1}$
$5\left(p+11\right)$
$\lim_{x\to0}\left(\sqrt{9x^2+x}\right)$
$-11\frac{2}{3}\:x\:\left(-4\frac{1}{5}\right)$
$\frac{20ac+20bc}{bc+ac}$
$2\left(-1\right)^3+4\left(2\right)^2-5$
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