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Exercice 60

b=

(12*(-3) )/ (-2* -3)

-36 / 6 = -6

c=

[(-6*5) +2]/ (-1+15)

(-30 +2) / 14

-28/14 = -2

exercice 61

[(-7*2) +24]/ (-4-6+9)

(-14 +24)/ -1

+10/-1 = -10

(25-42) * 9-(-5)

-17 * 14

- 238

9* (-8) = -72

(-8-6) /7 = -13/7

-72( -13/7) =

-72* 7/-13 = -504/-13 = 504/13

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