Thanks, it worked perfectly!

Thanks guys, it worked perfect. The only thing I would like to add now it to repeat the question for what number on the menu, but I don't want to repeat all of the code. I read a little bit about loops, but I am not sure how to make it. Like right before x is defined so when the first math function is made, it will ask again if you want to use another function. Then repeating all of the code without typing it out again. How is this possible?

I have had some basic knowledge of java through flash 8. I also use a freeware 3d software called blender. And it uses python for its game engine. So I have decided to pick up some python. This is some of my first experiences with it. So any help needs to be put in as basic of a way as possible. I believe everything is right, but when I try to run it, it says that there are problems with the tabs, and selects:
"elif x == 14:" ...