SOLUTION: -1-(-6-(4--6)

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Question 157223: -1-(-6-(4--6)
Answer by checkley77(12844) About Me  (Show Source):
You can put this solution on YOUR website!
-1-(-6-(4--6)
-1-(-6-(4+6)
-1-(-6-10)
-1-(-16)
-1+16=15 answer.