I would recommend more test cases, including some of matrices.
This user (ALBERT ALEXANDER STONIER) appears to have gamed the system, with fraudulent "likes" of this unremarkable solution submitted by 'sock-puppet' accounts. —DIV
Times 2 - START HERE
Is my wife right?
Sum of diagonal of a square matrix
Make a random, non-repeating vector.
Compute LOG(1+X) in natural log
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