# JEE Advanced Matrices and Determinants 2

**Algebra**Level 4

Find the sum of all values of \(n\) such that atleast one pair of two matrices \((A,B)\) of order \(n\) satisfies \(AB-BA=I\).

**Note that \(A\) and \(B\) are matrices and not scalars.**

Enter \(-1\) if no \(n\) exists.