
I've just used Flee to parse math functions to use for Simpson's Rule integration, just to see if I could get it to work. It turned out to be pretty simple and worked great. The code is in my comment at
http://www.codeproject.com/Articles/334308/NumericalIntegrationwithSimpsonsRule.
One thing to watch for is that Flee is written in VisualBasic.Net. VB is case insensitive while C# isn't.
So something like IDynamicExpression eDynamic = context.CompileDynamic("sqrt(a)"), like int the flee examples fails in c# , because the method there is Math.Sqrt. Same for other Math. methods, like Cos, Abs, etc.
So remember to capitalize if you are using c#.

