Model 10 prep.1 first term
23:38
Final revision pure part 3 first term
28:36
Model 3 prep.1
23:56
Revision on proportional in triangle sec.1
21:05
Model 5 prep.1
20:33
Sen(18º) e Cos(18º)
29:17
problems on equation of the circle sec.2
15:31
Ayudé A 2000 Personas A Caminar Otra Vez
30:58