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Calculați:
-123-{-(-15+86)-[-11-(39-47)]}


Răspuns :

= -123-{-(-15+86)-[-11-86]= -123-{-101-75}=-123-26=-149
-123-{-(+71)-[-11-(-8)]}
-123-{-71-[-11+8]}
-123-{-71-(-3)}
-123-(-71+3)
-123-68
=-191