• (m + 1)^3 - m^3 = 3m^2 + 3^m + 1 = n^2 -yma16- ♂ (658 bytes) () 11/21/2014 postreply 09:36:25
• Nice -亂彈- ♂ (0 bytes) () 11/21/2014 postreply 14:35:43