Réponse:
A=(-4+3^ * 2/7):(3/14)
A = (- 4 + 6/7) / (3/14)
A = [(- 4 * 7) / (1 * 7) + 6/7] / 3 / 1
A = (- 28/7 + 6/7) / 3 / 14
A = - 22/7 / 3 / 14
A = - 22/7 * 14 / 3
A = - 308/21
A = (7 * - 44) / (7 * 3)
A=-44/3.
B=4-(2-5)^ ^ 2/4+5
B = 4 - (- 3) ^ 2 / 4 + 5
B = 4 - 9/4 + 5
B = (4 * 4) / (1 * 4) - 9/4 + (5 * 4) / (1 * 4)
B = 16/4 - 9/4 + 20/4
B = 27/4 .