I rarely need to communicate equations except with other mathematicians or statistician, and in those circumstances, I presume (possibly incorrectly!) that they all speak TeX ... so I write the equation in the same way as I would if I were using TeX, LaTeX, or the kind of markdown that Stack Exchange uses.

No one has yet replied saying, "What was that supposed to mean!?"

Added in response to a comment question ...

I type the equation, much as I would in TeXMaker, including the $ and \ marks. My reason for doing so? Laziness! Sometimes I'm just cutting and pasting a line. I know it might sound inconsiderate, but for reasons similar to these, I don't think it is.

I rarely need to communicate equations except with other mathematicians or statistician, and in those circumstances, I presume (possibly incorrectly!) that they all speak TeX ... so I write the equation in the same way as I would if I were using TeX, LaTeX, or the kind of markdown that Stack Exchange uses.

No one has yet replied saying, "What was that supposed to mean!?"

Added in response to a comment question ...

I type the equation, much as I would in TeXMaker, including the $ and \ marks. My reason for doing so? Laziness! Sometimes I'm just cutting and pasting a line. I know it might sound inconsiderate, but for reasons similar to these, I don't think it is.

And finally ..

Having just read the nice answer by #Vectornaut, I might change my ways.

I rarely need to communicate equations except with other mathematicians or statistician, and in those circumstances, I presume (possibly incorrectly!) that they all speak TeX ... so I write the equation in the same way as I would if I were using TeX, LaTeX, or the kind of markdown that Stack Exchange uses.

No one has yet replied saying, "What was that supposed to mean!?"

I rarely need to communicate equations except with other mathematicians or statistician, and in those circumstances, I presume (possibly incorrectly!) that they all speak TeX ... so I write the equation in the same way as I would if I were using TeX, LaTeX, or the kind of markdown that Stack Exchange uses.

No one has yet replied saying, "What was that supposed to mean!?"

Added in response to a comment question ...

I type the equation, much as I would in TeXMaker, including the $ and \ marks. My reason for doing so? Laziness! Sometimes I'm just cutting and pasting a line. I know it might sound inconsiderate, but for reasons similar to these, I don't think it is.