To add your solution, when you click on your button you will already be at the edit page. To get there otherwise, just click the "edit" tab above.
Click it now, and you can edit this page.
To add math stuff, click the "Sqrt (n)" button above. It gives $ Insert formula here $, just delete the "insert formula here" and add your math- when you are between the math markers, use Latex language.
For example,
First integrate as follows: $ \int f(x)dx $ and then you see the result!
