I've been playing around with animating the relative weight of the terms of mathematical equations by adjusting their font size of those terms. It sort of ends up being a visualization of Big-O notation in that you can see what terms because meaningful / meaningless as the index increases. There's no equation editor yet, since I haven't brought over my equation parser from jEmplode, but you can play with the sample equation that I have in there.

Not sure what the minimum VM is that you need for this to work ... I'm running 1.4, though.

http://www.inzyme.com/equation/index.html