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I am puzzled by how does one create a question with MathJax in it. I do not know how to use MathJax and I am asking now for help regarding this situation. Thank you.

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  • $\begingroup$ When you're composing a question, there's a block on the right side of the screen with formatting help, it contains a mathjax example and a link to more mathjax help. $\endgroup$
    – Kevin
    Commented Jun 10, 2015 at 16:55
  • $\begingroup$ A related (new) FAQ: A brief guide to MathJax for PSE users $\endgroup$
    – V2Blast
    Commented Apr 22, 2023 at 0:44

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Simply include the MathJax between dollar signs ($), like so:

blah blah $\sum_{x=0}^{100}(x)$ blah

blah blah $\sum_{x=0}^{100}(x)$ blah

If you want the MathJax to be displayed as its own block, rather than inline, use two dollar signs:

$$\sum_{x=0}^{100}(x)$$

$$\sum_{x=0}^{100}(x)$$

For a comprehensive tutorial, see this post on meta.Mathematics.

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