This plugin provides an option to add MathJax script as well as Pretiffy script and enables them by default on all question pages.
A widget is also provided which you can add at the end of page if you need MathJax and Pretiffy on any other pages.
For editor support please use this modified ckeditor.
Download the ckeditor and place inside qa-plugin/wysiwyg-editor folder. Also copy qa-question.js file inside tobecopied folder to qa-content folder replacing the file present there.
This is a beta code, using it at your own risk on a production environment.