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Here you can try the editing commands. See http://en.wikipedia.org/wiki/Wikipedia:Quick_guide for a quick introduction.
The math notation on this wiki uses LaTeXMathML (a simple formula language based on a subset of LaTeX).
E.g. $\sqrt{2n}=\sqrt{2}\sqrt{n}$
$\left.\sin\left(\frac x y\right)\right]_1^2$

