$\frac{1+csc\left(b\right)}{\cot\:\left(b\right)+\cos\:\left(b\right)}=\sec\:\left(b\right)$
$\frac{d^2}{dx^2}\left(e^{xy}\right)$
$2^{-3}+3^{-3}$
$\left(6x\:+\:2\right)\:\left(6x\:+\:4\right)$
$3a-5b+8+9b+8a+2\:$
$\frac{dy}{dx}=\frac{x+y+1}{x+y+2}$
$\int cot\left(2x+5\right)dx$
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