How many different positive numbers (integers) can you make using each of the digits 1, 2, 3, 4, once only, and a take away sign?

Example 31-24, or 413-2

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How many different positive numbers (integers) can you make using each of the digits 1, 2, 3, 4, once only, and a take away sign?

Example 31-24, or 413-2

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