$2xydx+2xdy=0$
$\frac{5xy^{-3}}{y}$
$\frac{1}{3}\cot\left(2x\right)=1$
$\left(2\sqrt{2}-4\sqrt{8}\right)^2$
$\left(+18\right)\cdot\left(-55\right)$
$a^2-3a-2$
$\left(7x^3+2\right)^3$
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