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See http://meta.wikimedia.org/wiki/Help:Formula



Here is an inline formula: \ddot\varphi = \partial^a\partial_a \varphi. Here is an array of formulas:


\begin{array}{rcl}
   \dot\varphi & = & \pi \\
   \dot\pi & = & \partial^a \partial_a \varphi
\end{array}

Click on "edit" to see the raw text.



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