$\lim_{x\to0}\left(\frac{xsin\left(2x\right)}{1-cosx}\right)$
$3\left(4x-7\right)+3x+9$
$2x^2-12x+18$
$\log\left(\frac{1000x^2}{\sqrt{y}}\right)$
$cosx\:=\:-1$
$\left(\sec\left(b\right)\right)+1\left(\sec\left(b\right)-1\right)=\tan^2\left(b\right)$
$g^2+2gb+b^2$
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