How much math do I need to understand the Feynman's Lectures on Physics? Does he explain the math or does he expect me to know it all already?

I am very familiar with single-variable calculus and I know a bit of multi-variable calculus. I also know some basic linear algebra (and of course I know elementary synthetic geometry). I know very little about ordinary differential equations (just the simplest kinds of first- and second-order) and absolutely nothing about partial differential equations.

Will I be okay reading Feynman's Lectures or do I need more?