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Old 03-07-2012, 04:29 AM
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Default Using TeX in your post

You can include mathematical expressions in your post by using the math tag. If you type (without the spaces around math and /math, which I added to prevent rendering):

[ math ]\sum_{n=1}^N x_n[ /math ]

it will be rendered as:

\sum_{n=1}^N x_n