First thing that comes to my mind is and , and .
I never bothered learning the formula to find the equation of a straight line given a co-ordinate and gradient, it's something you can figure out easily enough.
Logarithm rules aren't given in the formula book
The nth term of sequences aren't given, but summations are. Again, doesn't matter if you don't know - if you really need to you can derive them.
Oh, chain rule and product rule for differentiation need to be learnt.
There are double angle formulae, but you're given the addition formulae already anyway. If you do enough practice you'll end up memorising them anyway.
No formulae you need to learn for stats. It's all in the formula book if you look far enough.
None for mechanics either, they give you suvat. Everything else should be pretty basic knowledge, e.g. F = ma, velocity being the time derivative of displacement.