$sec\:x\:\frac{dy}{dx}=e^y$
$\int_{-\infty}^{-2.6667}\left(\frac{1}{\sqrt[2]{2\pi}}\right)dx$
$v^2-12v+36$
$2x^2+4x=0$
$\int_0^1\frac{1}{x^2+a^2}dx$
$70-\left(40+31\right)-\left(-55\right)$
$97\cdot83$
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