$12x^2>0$
$\int\left(\frac{\sqrt{x^2}-16}{x}\right)dx$
$\lim_{x\to0}\left(\frac{sin\left(\sqrt{x^4+x^2}\right)}{\sqrt{x^2+9}}\right)$
$7+4^2$
$nbny$
$2p\:+\:4p\:-\:9\:$
$y=\frac{\left(3x+1\right)^2}{4x\left(2x-1\right)^4}$
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