David W. answered 08/30/17
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It helps to have a list of partial answers:
6*5=30
6-5=1
7-5=2
7*5=35
6*7=42
With these numbers, it is not likely that division is used [you usually need to produce an integer quotient].
Now, if exponentiation is permitted (see P-E-M-D-A-S), you may write:
6(7-5) = 62 = 36