$\int e^t\:dx$
$\sec\left(x\right)^2+\tan^2\left(x\right)=1$
$x^2+18x+91$
$7x+4y=13$
$\lim_{x\to0}\left(\frac{\sin3x}{x\cos2x}\right)$
$9-\left\{5-4+\left(-2\right)\right\}$
$\int csc^2\left(u-bx\right)\:dx$
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