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I have feeling that something like this has been asked before, but I cannot find such post, so my memory might be fooling me.

Do you think that giving here examples of usage of the most frequently used LaTeX constructions here at meta could be useful for our users? I tried to write down something for integrals here: How to show the integral symbol on this site?

If you think that this would be a good thing, what topics to you think should be covered.

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If we decide to do something like this, I like the way LaTeX help is organized at sosmath, so I would go with something similar to their help:

  • Basic commands (superscripts, subscripts, bracket for sets $\{\}$, inequalities $\le$ and similar stuff that is frequently used, but does not fall nicely into other categories; \operatorname and \text could be mentioned here)
  • fonts and some frequently used symbols (like $\pm$, $2\mid4$, $2\nmid 3$, $\infty$, $\vec{a}$)
  • alignment and multiline formulas (perhaps also difference between inline math and centered formulas could be explained there)
  • polynomials, radicals, fractions
  • Greek letters
  • trigonometry
  • limits
  • sums
  • derivatives
  • integrals
  • matrices
  • sets, operation with sets ($\cap$, $\subseteq$, $\bigcup_{n=0}^\infty$ and similar stuff; notation for intervals - $[a,b]$ or $\langle a,b \rangle$ but not $<a,b>$)
  • (maybe) combinatorics (also from the top of my head I can only think of binomial coefficients, so this might fall under frequently used symbols)
  • (maybe) tables (array, \hline, etc.)
  • (maybe) elementary number theory (divisibility, congruences, Jacobi symbols)
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I don't think compiling yet another LaTeX cheatsheet is a good use of meta when there are so many other great references available online. Many of them are linked to in the comments and answers to the previous question "where is the latex reference please".

On the other hand, I do feel that those resources need to be made more visible. They ought be linked to in the help text, both on the side of the Ask a Question form, and in the formatting help page. A link or two to a quick reference under the LaTeX bullet point wouldn't hurt.

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    $\begingroup$ What should be documented somewhere is the commands from which LaTeX packages are supported (amsmath seems to be; let's test a few more: mathds: $\mathds{C}$, mathtools: $\coloneqq$, cancel: $\cancel{p}$ — OK, none of them seems to be supported). $\endgroup$ – celtschk Jul 5 '12 at 7:25

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