CLONE - A user can add equations using an equation editor

This test requires the MathJax filter to be enabled by an admin.

1. Log in as a student, go to a course and access any activity requiring text input, such as a forum reply or an online text assignment submission.
2. In the text editor, click the 'Show more buttons' button then click the 'Equation editor' button.
3. Try entering an equation and check that the equation preview shows it correctly.
4. Click the 'Save equation' button.
5. Click the 'Save changes' button and check that the equation is displayed correctly.
6. Go to http://www.mathjax.org/demos/tex-samples/, choose an equation then right click and select Show Math As TeX Commands.
7. Copy the TeX commands then repeat steps 1 to 5, pasting the TeX commands into the equation editor and checking that the equation is displayed correctly.