$\lim_{x\to0}\left(\frac{\sin\left(3x\right)^2}{x^2cosx}\right)$
$2\:x^2\:-11\:x\:+14\:=\:0$
$\frac{n^{19}}{n^{11}}$
$\frac{m^{2n}-n^{2n}}{m^n+n^n}$
$6x^{2}-xy-2y^{2}\cdot\frac{12x+y}{3}$
$-43=-\frac{x}{4}$
$\frac{dy}{dx}=xsqrt\left(1-y^2\right)$
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