Basically, it returns a specified number raised to the specified power.

The first argument contains the value you want to use

The second argument contains the power value you want to implement.

For example, if you have this

result = Math.Pow(3, 3);
return result;

It will return value 27 because it is 3 x 3 x 3.

But if I write

result = Math.Pow(1, 3);
return result;

It will return value of 1 because it is 1 x 1 x 1.

What if I write the 1st argument of 5 and 2nd argument 1?

result = Math.Pow(5, 1);
return result

It will return as 5 because it is 5 x 1.

You can figure it your own. http://www.w3schools.com/jsref/tryit.asp?filename=tryjsref_pow

UPDATED

Here's the example of the input. Use Power instead of declaring application.Power

case "^":
    result = Power(firstInt, secondInt);
    labelResult.Text = ("" + result);
    break;