$\frac{dy}{dx}\left(x^y+y^x=2\right)$
$\int\left(\frac{1}{s}\right)ds$
$\frac{x}{x-1}-\frac{2}{x}=\frac{1}{x-1}$
$8.gfd\:-\:gfd2$
$\frac{x^3-7x+1}{2x^2-8}$
$\sqrt{-58}$
$u=\sqrt{\sen^{2}x+\cos^{2}x+\tg^{2}x}$
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