WIRIS provides educators a tool for creating great math notation and using it within platforms like Moodle. While it’s a software as a service, the WYSIWYG math equation editor provides a visual tool for creating math equations right within Moodle questions (or in answer boxes by students).
Their plugins have long been available for Moodle in both HTMLarea and TinyMCE. Their plugin is now available for Atto editor,
Via Miloš Bajčetić