Math preparation for an interview at Renaissance Technologies

I got called for an interview at this quant firm called Renaissance Technologies. They seem fairly quantitative and want people with a mathematics background. How can I prepare for this interview. What math skills should I review? Would probability (similar to Jane Street interviews) and calculus stuff be enough (like AP level or university calculus), or should I also brush up on my number theory, lie algebra, geometric topology, stochastic calculus, and complex analysis knowledge just in case they throw a curve-ball? Should I do some practice problems from the Putnam just to get in the mood? Does anyone (presumably who has interviewed with this firm) know where I can find prep materials? Do they ask brain teasers as well? 

Much appreciated!

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