$49x^2\:-\:14x\:-\:3\:=\:0$
$\frac{d}{dx}2x^3+x^2y-5x=3y$
$\lim_{x\to0}\left(\frac{1-cos\left(x\right)}{\sin\left(2x\right)}\right)$
$\left(x-2\right)^2\left(x+2\right)^2$
$a+1-2xy-3+xy-2$
$\left(2y\:+7m\right)^3$
$\int cos^4\left(\sqrt{2}x\right)dx$
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