$4q^2\:+\:20rq\:+\:25r^2$
$\frac{d}{dx}\:\sqrt[4]{\frac{x}{9x+1}}$
$\sqrt{x=2}$
$1x^2+22$
$\int_0^{\pi}\left(6\sin\left(2x\right)\cdot\sqrt{20\cos^2\left(2x\right)+16}\right)dx$
$280x-80y=-40$
$\frac{3}{x^2}+2$
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