User contributions
- 18:53, 20 September 2011 (diff | hist) . . (+55) . . N AoPS Wiki talk:Problem of the Day/September 20, 2011 (Created page with "f(x)=x^2 f(f(x+1)=f((x+1)^2)=(x+1)^4=x^4+4x^3+6x^2+4x+1") (current)
Sign In
Register
math training & tools
Alcumus
Videos
For the Win!
MATHCOUNTS Trainer
AoPS Practice Contests
AoPS Wiki
LaTeX TeXeR
MIT PRIMES/CrowdMath
Keep Learning
Sign In
Register
