Evaluate each function

I am going to give you all the answers after I explain how to answer these questions by yourself. Basically, just substitute the numbers into the function accordingly. 

For example, lets say I have the arbitrary function:



If I want to calculate of that function, replace all 's with 1. 





Done! Lets try calculating



 

Those are just some examples. There are many. Without further ado, here are the answers:

1)-2
2)4
3)10
4)-36
5)16
6)30
7)6
8)61

Thank you, and I hope that helped you. 

The answer is 6 weeks