Yes, you can view the shortcodes on the quiz/survey list page
Yes, you can use <img> to include an image in a question.
Yes. But you need to extra plugin to support Latex.
Please refer How to create a CSV file for a quiz/survey for details. You can also download a demo CSV file on the new quiz/survey page of the plugin.
Limits and Restrictions
A question in a survey can have at most 10 options. For questions in a quiz, their options are not limited.