So I was looking around for resources relating to easing functions, mostly for my video editing automation project I'm working on.
I came across this amazing site.
It has really nice examples of basically any easing function I could think of. Its an amazing resource.
I actually adapted all the math formulas for each easing function and put them into a go package for ease of use in your code.
The repo is here, I'm also adding a ffmpeg specific sub package for it as well, to get a string representation of the same formulas to use in dynamic ffmpeg filter arguments.