$\sec\left(x\right)\csc\left(x\right)-cotx$
$8x+3\ge11x-3$
$x+6=2$
$17\:+21+\:18\:+27+\:17\:21+\:20\:+22\:+18+\:23$
$\frac{dy}{dx}-\left(\frac{2x}{1+x^2}\right)y=x^2$
$2ab-3a+c-9=10$
$\frac{dv}{dx}=-\frac{v}{x}$
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