$\frac{x^2}{4}-16$
$x^{2}+3x+2>0$
$10+4h-8h-1$
$\frac{dy}{dx}=\frac{cos\left(20x\right)}{e^{20y}}$
$\frac{d^2y}{dx^2}=\sin\left(3x+\frac{\pi}{2}\right)$
$a^2+4a+4^2$
$\:\frac{x+3}{2}+\frac{x-1}{4}>\:2$
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