Duplicate of Problem 2980.
This user (ALBERT ALEXANDER STONIER) appears to have gamed the system, with fraudulent "likes" of this unremarkable solution submitted by 'sock-puppet' accounts. —DIV
Finding Perfect Squares
What is the distance from point P(x,y) to the line Ax + By + C = 0?
Convert a vector into a number
Equal to their cube
Sum the numbers on the main diagonal
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