User contributions
- 02:09, 2 October 2012 (diff | hist) . . (-1) . . 2006 IMO Problems/Problem 4
- 02:08, 2 October 2012 (diff | hist) . . (+94) . . N 2006 IMO Problems/Problem 4 (Created page with "Determine all pairs <math>(x, y)</math>$ of integer such that <math>1+2^x+2^{2x+1}=y^2</math>.")
