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Sagot :

Pour l étape 2:
3) -25 - ( 10 - 4 * 3 )
= - 25 - ( 10 - 12 )
= - 25 - 10 + 12
= - 35 + 12
= - 23

4) -2 + 3 (-4 -2 ) - ( - 8 + 2 * 5 )
= -3 + 3 (-6 ) - ( - 8 + 10 )
= - 3 - 18 + 8 - 10
= - 23

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