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Sagot :

Bonsoir,

(+3)  +   (-7)  +    (+5)   -  (-1)  = (+2)

(+3)   -  (-7 )   -  (+5) +   (-1)  = (+4)

(+3)  +  (-7)  -  (+5 )  - (-1 ) = (-8)
Bonjour (+3)+(-7)+(+5)-(+1)=(+2) // (+3)-(+7)-(-5)+(-1) //(+3)+(-7)-(-5)-(+1)=(-8)

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