14:11

A Diophantine Equation @dhdkro

17:08

Solving a Quartic Equation

11:58

|x-1|+ |2x-1| = 5

13:51

so you want a VERY HARD math question?!

12:34

an interesting limit

14:24

Cubic Formula for Depressed Cubic

15:30

Por qué el círculo tiene 360 grados

5:15

The High Schooler Who Solved a Prime Number Theorem