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Make up as many expressions with numbers...

Make up as many expressions with numbers (no variables) as you can from three numbers 5, 7 and 8. Every number should be used not more than once. Use only addition, subtraction and multiplication.

Text Solution

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Expressions that can be made using `5,7,8` are
`5+(8+7),5−(8+7),5xx(8−7)`
`5+(8−7) ,5−(8−7),5xx(7−8)`
`5+(7−8),5−(7−8),5xx(8xx7)`
`5+(8xx7),5−(8xx7),5xx(8+7)`

`8+(5−7), 8−(5+7),8xx(5+7)`
`8+(7−5),8−(5−7),8xx(5−7)`
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