Your total trophy count is the sum of the trophies you gain in Royale and the trophies you get on topics you play. 

Let's go back to school: If you have 50 trophies in Royale, 30 trophies in Logos, and 20 trophies in Superheroes, your total trophy count will be 100 trophies.

I think we need 20 trophies more here for the Math topic :D