$\int sec\:xdx$
$\frac{10^{12}-1}{1000-1}$
$\cos\left(x\right)-\cos\left(2x\right)$
$0.6403+0.2006+0.3428$
$\lim_{x\to6}\left(\frac{x^2-x-30}{x^2-16x-60}\right)$
$10cosb+6=4cosb+4$
$\frac{b^{24}}{b^{11}}$
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