55:50

LECTURE 9 STRAIGHT LINE

58:13

LECTURE 11 STRAIGHT LINE

46:36

LECTURE 12 STRAIGHT LINE

42:49

LECTURE 3 CIRCLES

54:43

LECTURE 11 DIFFERENTIAL EQUATIONS

1:11:38

LECTURE 5 CIRCLES

1:14:11

LECTURE 1 CIRCLES

1:04:15

LECTURE 2 CIRCLES