3 sum with Rubi and David

21 mins 13 secs

19 secs

8 mins 12 secs

4 mins 21 secs

27 secs

1 min 5 secs

13 mins 35 secs

33 secs

2 mins

2 mins 7 secs

2 mins 3 secs

2 mins 49 secs

25 mins 52 secs

1 min 51 secs

1 min 47 secs

2 mins 29 secs

2 mins 41 secs

19 mins 19 secs

25 mins 35 secs

3 mins 57 secs

51 secs

8 mins 34 secs

12 mins 2 secs

9 secs

1 min 16 secs

2 mins 25 secs

40 mins 31 secs

3 mins 20 secs

3 mins 25 secs

9 mins 8 secs

43 mins 59 secs

14 mins

10 mins 2 secs

9 mins 13 secs

1 min 30 secs

13 mins 27 secs

1 min 45 secs

11 mins 11 secs

6 mins 18 secs

47 secs