styling mathematics

I'll work on reducing the study tips somehow, I think a smaller font could work and maybe a shade of grey is a good idea too. Thanks for the feedback.

As for the tags, to have them visible would mean to make a modification to each of them when they are created, if we create a few dozens of them, it will be annoying to edit all that. And the result would be to have them at the very bottom of the page. I feel like hitting the edit button is by far our easiest way for the moment.

Let's focus on questions, hints and solutions for the rest of the week, we'll see when we have the group meeting what others feel about this. Maybe we can streamline the process there.