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I have edited the answer:
1-23+45+67-89
uses$$1-23+45+67-89$$ uses only 4 operators.
uses only 4 operators.
$$1-23+45+67-89$$ uses only 4 operators.
1+23/45678^9 = 1-23+45+67-89
uses only 34 operators.
1+23/45678^9 = 1
uses only 3 operators.
