Question Little scratch MOBO

Excellent picture.

No traces appear broken, so shouldn't present any problems with the system working. You do have some exposed copper traces. If you wanted to be cautious you could take some clear nail polish and wipe that over the damage to prevent it from oxidizing.
 
The long scratch may not be that bad, but there are two small round scratches on the top right near the SMD components. I'm afraid there are broken traces.
 
Those are PCIE lanes, but not 16X. Probably to a slot that may not be used. It probably wouldn't be a problem to find out which slot they lead to and measure them.