using System;

using org.matheval;

using System.Collections.Generic;

public class Program

{

    public static void Main()

    {

        Expression expr = new Expression("MAX(a)");

        expr.Bind("a", new List<Decimal> { 10m, 9.6m, 135, 724.2m, 6m, -4m });

        Decimal value = expr.Eval<Decimal>(); // return 724.2

    }

}