Math (extra practice)

I don't get how to do this.
Use these numbers to get the answer showen below. However, don't stick numbers together.

Try to get: 22
Using: 3, 6, 5, 5, 0

The teacher gave us the answer but I don't know HOW this works:
3! + (6*5) - (5+0)

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  1. I just need to know how ! works.

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    posted by Bridgett

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