I did not mention it before but I’m mentoring a project for Mozilla in the Google Summer of Code of this year. My mentee is Raniere Silva, a math student from Brazil. He is working on a mathematical keyboard and he just released a demo today. There is already work to be done, of course but the project is working well. Check the demo following his tutorial about how to install the new Math layouts on a Firefox OS device (Flatfish tablet included!)
Uno + uno = diez 