tightening sequence of what part?
Andrea Celeste - 1979 1-57 is rated/received certificates of: Argentina:Atp
1 + 71 = 8 8 + 72 = 57 57 + 73 = 400 400 + 74 = 2801
21
77-10=66 66-9=57 57-8=49 subtract ten then nine then eight then seven then six and so on
42
39, 48, 57, 66
-11n + 17
342
356
71
(Term)n = 59 - 2n
57