$\frac{3}{5}m^2-mn+\frac{1}{10}m^2-\frac{1}{3}mn+2mn-2m^2$
$\sqrt{\frac{ab}{x}}$
$-10-\left(40-90\right)$
$\cos\left(\pi-\cot\left(-2\right)\right)$
$\int\left(cos^5\:2x\right)dx$
$9p^2-12p+4$
$-14-1-1$
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