Hello Emmanuel,
- Install the plugin Microsoft Word File Import/Export (Question Format).
- Export a question from Moodle to get the correct Word table format.
- Edit your question in Word to comply with the required table format.
- Import the question to Moodle.
It handles Latex equations and works like a charm.
Also check Using TeX Notation. The syntax may be a little different. For example, you need to put equations between double $$, not single $.