$\frac{d}{dx}in\:\sqrt{x+1}\sqrt{2x-2}\sqrt{x+4}$
$7-2x\ge-3$
$\frac{d}{dx}\left(2x^2+5xy^2-10x\right)$
$b^2+8b-9$
$\left(5x^1y^{11}\right)^2$
$\lim_{x\to0}\left(7x\right)^{2x}$
$16b^2-40b\:+\:25$
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