10:48

Find all real x

16:49

Find all positive integer n

16:43

A Vieta Problem

7:16

Sum from 1 to infinity of 1/(k^2+1)

12:49

Number Theory: The Division Algorithm

21:39

a * b = ab + a + b

23:42

Basic Math Calculus – You can Understand Simple Calculus with just Basic Math!

12:18

finding ALL pythagorean triples (solutions to a^2+b^2=c^2)