I agree with the general sentiment (don't study now). The logic:
1) If the school thought you were not prepared enough to make it through the math camp,first, and the program, later, they would not have admitted you, or (see below):
2) If they thought you needed some extra prep, they would have informed you (I know some Sociology majors who got admitted contingent on their passing accounting and basic math undergrad courses).
Just chill. Unless you want to graduate in the top 1 - 5% of your class and need a head start. In that case I can't help you.