18:24

What does the second derivative have to do with area??

19:43

Continuously Differentiable Functions

6:39

How a president's death helped kill Washington's "spoils system"

10:27

can you find the limit of this recursive sequence??

17:20

Power sums with Calculus.

16:50

what do mathematicians mean by "universal"?

20:55

DESTROYING a Digamma Integral

14:35

the famous Calculus proof of the Pythagorean theorem.