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+8+2=10
-5+4-2=-1-2=-3
+6-1-3-4=-2
9-4=5
a) -3 - +6 = -3 - 6 = -9
b) +8 - -2 = 8 + 2= 10
c) -5 - -4 + -2= -5+4-2= -3
d)6+-1-+3+-4= 6-1-3-4=-2
e) 9- (3+1) = 9-4 = 5