Going the other way, if you want to enter the LaTeX variant called MathJax locally (PC and Mac), which is used on math.stackexchange.com (among other other plac

Going the other way, if you want to enter the LaTeX variant called MathJax locally (PC and Mac), which is used on math.stackexchange.com (among other other places), try http://www.inkcode.net/qute http://www.inkcode.net/qute. I find this very handy for short to moderate length math. In my weirdness, I like to use qute in split-screen mode, and work out the math as I enter it, never writing anything down. I then make corrections, modify things, move lines around, all in qute. I have developed some techniques for having correct MathJax syntax at almost all times, which I find necessary since qute does not show the result of an incorrect expression. I find qute very useful for formatting math. Since it is all offline, no connection is needed. After the formatting is correct, I can then push it to the clipboard and paste it into whatever I want (usually math.stackexchange.com). I recommend qute highly. Again, it is for Windows and Mac OS, not Linux (unfortunately).