Bonjour j'ai besoin d'aide merci calculer les expressions suivantes

A =3X (6+14÷2)-9
B= 3X6+(14÷2-9)
C=3X ((6+14)÷2)-9
D=(3X 6+14)÷2-9
E=3X( (6+14)÷2-9)

merci d'avance
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