The first one is fine: Anything raised to the 0 power is one
The second one is fine: 0 divided by 5 is 0
The third one will result in an error: You can't divide anything by 0
The fourth one. I actually can't see that well, so I'm not sure if its 3^pi or 3^11, but either way, it won't return an error
The final one will result in an error.
