Tricky Tube Puzzle

HERE is a carriage serial number from a Northern Line train that makes an interesting Tube Puzzle: 52572.
As usual, each number should be used once, and once only, and must be added, subtracted, multiplied or divided to make a balanced equation.
There is a perfect solution, ie one that uses the digits in the order printed.
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My solution: 5 x 2 (- 5) = 7 - 2