User contributions
- 14:08, 21 February 2016 (diff | hist) . . (+1) . . Simon's Favorite Factoring Trick (→Olympiad)
- 14:07, 21 February 2016 (diff | hist) . . (-1) . . Simon's Favorite Factoring Trick (→Olympiad)
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
