a nice double sum.
31:19
A sum two ways!
22:38
Solving a crazy iterated floor equation.
14:06
Two nice double sums!
18:00
I really like this sum!
8:05
中國新主力狂轟2個11-1！非洲天才情緒上頭，摔拍砸球！結局更是驚魂動魄！蒯曼 vs 漢娜高達｜KUAI Man vs Hana GODA｜Singapore Smash 2025
21:23
a nice result from Ramanujan's "lost notebook"
15:02
a very Fibonacci product!
28:47