Can someone please tell me how do I write comments involving mathematical techniques as it appears in text books. Say for eg. I wish to write summation of q_i over all integral values of i as it would have appeared in a math text book having a sigma notation and everything...
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3$\begingroup$ You can see a lot of examples by clicking on “edit” to see the source of existing posts. Press Escape or Back or close the browser tab to abandon the edit. $\endgroup$– Gilles 'SO- stop being evil'Sep 9, 2014 at 12:46
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