What type pf math equations?
This is a pretty good calculator for variables and expressions...
Calculator Mobile 1.1 (FREE)
Another good one for simple and complex math...
NMCalc v1.0c (FREE)
And a student formula database for PPC...
Maths Formula 1.0 (FREE)
I hope one of these is what you are looking for. If not, could you be a little more specific in what you are looking for?
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