S'il vous plaît merci de m'aider sur ce devoir de mathématiques : Calculer en indiquant les étapes :
A = 5+4 x 7 - 3 +1 B = 8,9-2,7 + 4,9 - 3,4 +1

C = 7+3 x (7+49:7). D = 37 - [3+(19-9+2) x2]
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