Regional Math Olympiad Problem
5:52
Another System of Equations from Denmark
20:56
Find all integer solutions (Russian Math Olympiad)
16:33
USA Math Olympiad question with @skdjfk
17:10
Third International Mathematics Olympiad #2
24:56
Integrate 1/(1+x^3)
27:12
Austrian Olympiad System of Equations
10:43
Solving a septic equation
31:21