--- loncom/html/res/adm/pages/math_example.tex	2005/08/16 16:31:11	1.1
+++ loncom/html/res/adm/pages/math_example.tex	2008/05/28 01:45:32	1.2
@@ -1,3 +1 @@
-$$r = \frac{n\sum xy-(\sum \pi)\cdot (\sum \mu)}{\sqrt{\left( n\sum
-phi^{2}-\left( \sum x\right) ^{2}\right) \cdot \left( n\sum y^{2}-\left(
-\sum y\right) ^{2}\right) }}$$
+\[E_{\mbox{tot}}=\sum_{i=0}^N\frac{m_ic^2}{\sqrt{1-\frac{v_i^2}{c^2}}}=\sum_{i=0}^N\gamma_im_ic^2\]