I have a $6\times 6$ matrix in a comment that I wrote. I wanted to copy it and paste it into a new question.
But apparently that can't be done. After I post a comment, I can't click on "edit" unless, apparently, I do it within a few seconds, so I can't copy the TeX code. And copying the rendered version doesn't give me the TeX code.
But in Wikipedia articles, I can copy the rendered version and then paste, and what gets pasted is the TeX code.
Is there some way to overcome this and copy-and-paste?