Does anyone know what this is on my tuba?
tell me what to do.

It looks like it just needs to be cleaned unless you’re referring to the paneling in which maybe in the past it was broken and needed to get welded back together.

B.) what tasks you need to complete. this is because if there is even a little focus of what the world is doing, you are missing something that you need to be doing. its self discipline. by goggles you see, and be you goggles you are seeing you. no one else.

It is false my dude.