I am really bad in this. Sorry guys. I cant really solve it. Can you try solve whole example and like for real bad student ?

For example how did you get from i e on something ?

If someone have time would be nice if he can solve this examples but every step what you do..

I have like 4-5 examples and cant really solve it. and i have exam in 2 days

Best would be way like" Prove it " solved it. We are learning it like that.

z^4 = -16i , z^4 = -1, z^2=1-i√3, z^3=-2+2i, z^5=2+2i

or is there some manual where they describe everything.

Anyway thats for help what you allready solved.