A relaxing geometry problem.
5:23
A geometry quickie!
16:28
A very interesting differential equation.
10:21
a geometry problem inspired by Japanese Sangaku
15:44
Half of a deathly area...
26:38
a very golden Fibonacci sum
1:03:43
Cómo hablar
18:59
TODOS CAEN en la MISMA TRAMPA😍🏆 (Sin estudiar)
18:33