Comment 4 for bug 1472446

To test:

1) check that the $cfg->mathjaxconfig and $cfg->mathjaxpath variables are set in htdocs/lib/config-defaults.php

2) Go to admin -> configure site -> general settings and set Enable MathJax to 'on'

3) Create/Edit a page and add a 'text' block to the page

4) in the TinyMCE editor click the toggle icon (left of 'paragraph') to expand the options

5) Click the icon with hover state 'insert math' - it should open a popup titled 'Math Editor' that takes a few seconds to load

6) Click the third tab and click some upper and lower case greek letters - it should add your selection to the black background bit

7) Click insert line or insert display - the TinyMCE should be updated with some text, which may look a bit strange

8) Save the text block and the text displayed on the page should look like the greek letters you picked