10:45

1.1 Examples 6

12:22

1.1 Examples

10:01

1.1 Examples 4

7:39

Nastya shows that knowledge at school is the most important thing

9:30

1.1 Examples 3

23:59

1.2 #38a Gaussian

24:56

1.3 #4, 6

25:05

Algebra - How To Solve Equations Quickly!