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-5 - 6 = -11
+10 - 7 = 3
-(+12) = -12
+3 - (+11) = +3 - 11 = -8
+5 + (-24) = -19
-(-4+9)-(+6)=-11
-(-10)+(3-10)=3
-(3+11-8+6)=-12
+(-1+4)-(+17-6)=-8