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-5-(7)+4
-5-7+4
-1-7
-8
B. -(+3-2+4-6)+(-1+7)
-(7-8)+(6)
-(-1)+6
+1+6
7
-5-(+7)+4
-5-7+4
-12+7
-5
-(+3-2+4-6)+(-1+7)-12
-(+7-8)+(+6) -12
-(-1)+6-12
+1+6-12
7-12
-5
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