$8m^2-56mn+98n^2$
$\int_0^{200}\left(e^{\frac{-x}{150}}\right)dx$
$3x=-21$
$\frac{d}{dx}\frac{e^x-1}{1+e^{-x}}$
$sin^{-1}\left(-0.4\right)$
$-18143+444$
$x\left(x-2\right)\ge0$
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