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Math Symbols
Thanks TeaserGal

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Challenge:
Insert the math symbols between certain numbers to create an equation:
743  ( =,  -)        Answer :  7 - 4 = 3
6915 ( +, =)       Answer :  6 + 9 = 15
5371 ( -, +, =)    Answer :  5 + 3 - 7 = 1
87654321 ( -, +, -, =)  Answer : 
93723522  (+, +, -, =,  -)  Answer : 
2582645  (-, -, =, +, +)  Answer :

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