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  • Utilisateur Brainly
2014-10-08T21:30:25+02:00
7 x 2 = 14
14 x 5 = 70
70 + 1 = 71
6 + 3 = 9
71 x 9 = 639

(((7 x 2) x 5) + 1) x (6 + 3) = 639