$\frac{1}{x}\ge2$
$\frac{d}{dx}\frac{sex}{cosx}$
$38y^0$
$\left(x\right)\cdot\left(250-x^{-2}\right)$
$\frac{3x^2+48}{16}-\frac{x^2+80}{16}$
$1y\frac{1}{8}$
$\tan\left(\arccos\frac{-4}{50}\right)$
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