Finding the determinant of this matrix...

Hi r/learnmath, I'm having a mix up with finding the determinant of this matrix:

A = [[1,0,2],[3,-1,3],[-2,1,0]] (where each set of numbers is a row)

I worked it out and got the determinant to be 7, but when I checked it just now in wolfram alpha, it said the determinant was -1. I've tried taking the determinant about different rows and columns, but I keep getting 7. Am I right, or is wolfram alpha?

** EDIT **: I found my error, thank you for your help anyways!