After being intrigued by Quocorria's mathematical systems, you decide to extend your stay on this mathematically advanced planet.

While talking to a Quocorrian professor, he mentions Quocorria's other numbering systems. Your curiosity gets the best of you, so you decide you won't leave Quocorria until you master all of their systems.

The professor gives you a piece of paper with four true math problems on it. Like before, you must discover the system.
Note: This is a different system than last time
Here are the problems:
2+2=12
5-3=62
3x4=61
6/3=83

So, using this system, what is 1-3?