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+2+3-5+15-13
+2
g) -4+7+3-21+4
-11
h) -(13)-25+42+(-12)
-13-25+42-12
-50+42
-8
i) +6-4+7+6-1
14
j)-7+45+3
41
k) 14-3+18+6
35