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Sagot :

23+(-3-6)+(-11)-3) -10+(4+(-18)-(21)-4)
23-9+(-11)-3)-10+(4+(-39-4)
14+(-11)-3) -10+4+(-43)
25-3 -10+(-39)
22-10+(-39=
11+--39)
-28

23+(-3-(-18+24)+(6-17)-3)-10+(4+(-3-15)-(28-7)-4)
=23-3+18-24+6-17-3-10+4-3-15-28+7-4
=-49

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