Calculer chaque expression en détaillant les calculs: A= -7 x 2 + 24 : (-4) - (6 - 9)

B= (35-42) x (9+15:(-3))

9 x (35 - 43)
C= ———————-
(-8 -6) : 7

D= (-5)au carré + 13 - 4 au carré -5x 7
Merci de répondre vite je vous en supplie
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