-18-(-5-7)+(9-4)-(+3-2)=
$-18-(-5-7)+(9-4)-(+3-2)$=
=$-18-(-12)+5-(+1)$=
=$-18+12+5-1$=
=$-2$
-18-(-5-7)+(9-4)-(+3-2) = -18+12+5-1 = -2
@remanzini_rinaldo grazie mille
-18+5+7+9-4-3+2= -25+23= -2
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