1

using System;

namespace ConsoleApp27
{
    class Program
    {
        static void Main(string[] args)
        {
            float[] xValues = { -2.37f, -0.49f,7.51f};

            foreach (float value in xValues)
                Console.WriteLine($"x:{value} - y:{CalculationFunction(value)}");
        }

        private static float CalculationFunction(float x)
        {
            float a = 2.1f;
            float b = 6.7f;
            float y;

            if (x < -2)
                y = MathF.Pow(x,3) + 2 * a;
            else if (x < 5 && x >= -2)
                y = MathF.Log(MathF.Abs(MathF.Cos(b*x)),MathF.E);
            else
                y = MathF.Pow(x,2) * MathF.Pow(MathF.E,x);
            return y;
        }
    }
}