using System;

using System.Text.RegularExpressions;

public class Program

{

    public static void Main()

    {

        var expressions = new []

        {

            "test test test test totalamount(32604) > 0m)",

            "test test test test totalamount(32604, 13456) > 0m)",

            "test test test test minamount(32604) > 0m)",

            "test test test test minamount(32604, 34677, 12345) > 0m)"

        };

        var numbers = new Regex(@"(total|min)amount\(([\d,\s]+)\)");

        foreach (var expression in expressions)

            Console.WriteLine(numbers.Match(expression).Groups[2]);

    }

}