Typing Equations: LaTeX or Other Editors?

[loopgrav]

Since I am new to this forum, would somebody please tell me how most of you post questions/replies with equations. Are you using LaTeX or some other equation editor? If it is LaTeX, do I simply incorporate an entire LaTeX file?

Thanks for your help.

 

[Mk]

We use LaTeX here. I don't think you can upload LaTeX files.
You use the markup tags $$and[/ tex] (without the space), then put the codes inside.$$