$\frac{1}{2}x+\frac{2}{3}x-\frac{7}{6}x+\frac{1}{2}x-x$
$\sqrt{640}$
$\lim_{x\to0}\left(\frac{-1+\cos\left(x\right)}{2e^x-2}\right)$
$4x^3\cdot4x^3$
$ux-uy+u=0$
$\left(-9\right)\left(-5\right)\left(-2\right)$
$\left(a^{m+1}b^2\right)^2$
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