User contributions
- 17:26, 7 February 2011 (diff | hist) . . (+318) . . N 1969 IMO Problems/Problem 1 (Created page with 'The equation was<math>z = n^4 + a</math> ,you can put <math> a = 4 m^4 </math> for all natural numbers m. So you will get <math> z = n^4 + 4 m^4 = n^4+4m^4 +4n^2 m^2 - 4n^2 m^2</…')
