First, define an integer variable and assign it any value of your choice. Then you'll need to perform the following operations with it:
1. Add 9
2. Multiply by 2
3. Subtract 4
4. Divide by 2
5. Subtract by the variable's original value
6. Finally, display what the end result is.
7. Once your math / code is complete, double check your work by seeing what happens with the end result when you use different starting values. You should notice something "interesting".