$x^2+8x+15>0$
$g\left(x\right)=in\left(x^2\right)-\frac{x^2+5}{3-e^{2x}}$
$-2v+7v+-v$
$\int\sqrt{1-4\cos\left(x\right)^2}\sin xdx$
$\frac{d}{dx}\left(4-3e^x-e^{-3x\:}\right)$
$\frac{9-x^2}{x+2}$
$2x^2+14x+20=0$
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