an interesting equation
30:52
an interesting integral question
8:59
An Interesting Functional Equation
18:11
BASIC Calculus – Understand Why Calculus is so POWERFUL!
12:52
Test d'entrée à l'université de Harvard
18:11
A tricky problem from Harvard University Interview
18:39
Can you crack this beautiful equation? – University exam question
13:39
an interesting integral
20:09