$x^2+11x-12$
$\frac{1}{cos\:x\:}+tan\:x\:=\frac{\left(cos\:x\right)}{1-sin\:x}$
$\lim_{x\to0}\left(\frac{3e^x-e^{-a}-2}{a}\right)$
$1-2\sin^2\left(135\right)$
$\frac{5+2i}{8-2i}$
$x^4-8x^3+18x^2-16x+32$
$\int_0^1\left(\frac{24}{x^2-36}\right)dx$
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