using System;

using System.Collections.Generic;

using System.Linq;

using System.Linq.Expressions;

using System.Text;

using System.Threading;

using System.Threading.Tasks;

namespace ConsoleApp2

{

    class Program

    {

        static void Main(string[] args)

        {

            ParameterExpression a = Expression.Parameter(typeof(int), "i");

            ParameterExpression b = Expression.Parameter(typeof(int), "j");

            BinaryExpression r1 = Expression.Multiply(a, b);

            ParameterExpression c = Expression.Parameter(typeof(int), "w");

            ParameterExpression d = Expression.Parameter(typeof(int), "x");

            BinaryExpression r2 = Expression.Multiply(c, d);

            BinaryExpression result = Expression.Add(r1, r2);

            Expression<Func<int, int, int, int, int>> lambda = Expression.Lambda<Func<int, int, int, int, int>>(result,a,b,c,d);

            Console.WriteLine(lambda);

            Func<int, int, int, int, int> f = lambda.Compile();

            Console.WriteLine(f(,,,));

        }

    }

}