$\frac{1}{\csc\left(x\right)-\cot\left(x\right)}-\cot\left(x\right)$
$\frac{13}{2x}-\frac{5}{x}$
$5\left(2y\:+\:8\right)$
$x-12\ge17$
$\left(x-3\right)\left(2m^2+9\right)$
$\left(5+2x\right)^5$
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