Are these right? (Determinants)

Hello all! I'd like to check these as I'm not very confident that I got them right, and I'd really appreciate your input, especially as I've scrambled my brains with trilingual madness! (Rofl) So much fun :D

Anywho here's the questions with my answers, are they right?

Evaluate the following determinants.

and

*My answers;*

and

And one more question;

*Expand by minors*

This question *really *bothers me considering that supposedly it doesn't matter which row or column you expand- you're supposed to get the same answer everytime, I'm getting a different answer each time.

Example, expanding the first row;

And if I expand the middle column;

Example, expanding the first row;

So... what am I doing wrong? D:

Thanks in advance for any help