Almost all the time, new users post a question with no explanation with no context given, and no mathjax used. I have written "Please write what you tried" a countless number of times. There should be a popup or message that asks new users to confirm that the met all of the following requirements before posting:
Maybe there can even be a requirement that users open the Mathjax page before posting a question. I know some users will skip through all of this like they skipped through the advice page that new users get before asking a question, but I believe this will improve the quality of new posts on the site. Also, an idea is to only make the "proceed" button available after they have checked the box and reviewed their question for at least 10 seconds.