### Home > INT3 > Chapter 4 > Lesson 4.4.3 > Problem 4-128

4-128.

Try a few different inputs. Are you surprised by your results?

Your output should be the same number as your input.

Carrie claims that she was not surprised by her results, and she can show you why by using an input of

. Inputinto the stack of function machines and show all of the steps. What happens?input:

Function 1:

Function 2:

Simplify the output of Function 2, and then substitute it for

in Function 3.