$\:\lim_{x\to1.2\pi}\left(\frac{\left(cosx\right)^2}{1-sin\left(2x\right)}\right)$
$\int\frac{x^3-x+3}{x^3-4x}dx$
$\lim_{x\to35}\left(\cot\left(x\right)\right)$
$\int x\cdot\left(t^2+t\right)\sin\left(t\right)dt$
$sec=-\frac{29}{20}$
$3\cot\left(x\right)+2=5$
$bc\:\cos\left(a\right)\:+\:ac\:\cos\left(b\right)\:=c^2$
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