$sec\left(x\right)\left(cot\left(x\right)+cos\left(x\right)\right)=csc\left(x\right)+1$
$\left(9-7c\right)\left(5+3c\right)$
$3\:-\:8x\:-\:7\:+\:7x$
$\frac{dy}{dx}=\frac{y+2}{x-4}$
$x+2>2-x$
$\csc\left(x+7\pi\right)$
$19z+4-5z$
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