I went through the UK education as well, did you do just E math? You can take Additional Math along with it, that covers complex/imaginary numbers as well as Poisson sequencing/binomial theorem.

The thing is, I use very little abstract math in programming. Doing analytic philosophy actually did more than mathematics. The math stuff I do in programming is super basic stuff like trigonometry (sometimes trig with differentiation if I want to be fancy and use inflexion on curves) for GPS triangulation etc. I've never had to do anything more complex than that