$\frac{\cot^{2}x-1}{1-\csc^{2}x}$
$\left(3y^2\right)\left(2\left(xy\right)^{\frac{1}{2}}\right)$
$3^3-5^2$
$48x\left(\sqrt{9x^2}\right)\left(\sqrt{36}\right)$
$\int x\cdot\left(5\cdot x-2\right)^{-3}dx$
$\left|-8+2\right|$
$\frac{9}{s^2\left(s^2+4\right)}$
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