$\tan^2x\:+2\sec x-2$
$5x^4-\:20xy^3$
$6.5\cdot10^5$
$2xdx+\left(1+x^2\right)dy=0$
$\int\:-14e^{-5x\left(-74\right)}dx$
$18\cos\left(10x\right)+2=10$
$\frac{1}{6}\int e^{-3x}\csc\left(3x\right)dx$
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