"Crazy notation and random skribbles" are most likely math (or at least math notation) you arn't familiar with.
When I took my undergrad game theory class, the only math I had was high school calculus, and I learned a lot of notation. You'll get used to it and it will make understanding future math classes (or applied math classes) much easier.
Something like the following picture (a definition for Nash Equilibrium) was like a foreign language, but now it makes sense to me.
Make sure you make an effort to get a deep understanding of what the symbols mean, otherwise you will waste so much time just trying to translate what the professor is writing, leaving you no time to understand what he is teaching.