$14m^2n^2+7mn$
$\frac{\left(m^2\right)^{\frac{1}{2}}}{\frac{1}{2}m}$
$\left(x+2\right)^2-\left(2-x\right)^2$
$8\cdot i^2+1$
$4\cos\left(x-\frac{\pi}{2}\right)-2\sqrt{2}$
$\int_{-5}^{-2}\left(\frac{5}{x}\right)dx$
$\frac{d}{dx}\frac{2}{3x}-\frac{2}{3}$
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