When term-by-term differentiation is illegal.
17:53
Supreme Integral with Feynman's Trick
8:03
罕見怒吼？莎頭組合大爆發，絶境時刻打出超級配合！決勝時刻更是出現戲劇一幕【王楚欽 孫穎莎 vs 林詩棟 蒯曼】
12:36
a very cool integral comparison problem
12:20
An equation Diophantus never considered.
31:10
the geometry of the third derivative
38:32
Why is calculus so ... EASY ?
15:43
what function satisfies these conditions??
24:18