Latex

Since you're question is very general, I'm addressing three things you might be trying to do.

You can upload practically any file as a course material, so if you want your students to work directly with your LaTeX, you can upload the file.

If you want students to read a rendered version of your LaTeX, you can convert / export to PDF and upload that as a course material.

If you are trying to paste LaTeX into a course outline or post to maintain the formatting, that generally won't work and may likely appear as its raw source. However, OS X apps have the capability of exporting a choice of formats during copy / paste operations, so if you are using an OS X LaTeX app that supports a variety of formats for copy / paste, your browser may be able to preserve the formatting. (I don't use LaTeX, so I can't recommend an editor that would support the behavior.)

Does that answer your question?