What does the dealer do for your cars 35k mile tune up?

I have to take my car in for its 35,000 mile tune up. However these tune ups run around $500. I was wondering, other than obviously changing oil, and perhaps checking fluid and brakes, what else are they really doing that costs $500? Some B.S. 30 point check?

I recently just had 4 brand new tires put on the car, which were balanced and aligned, so I’m more than sure I don’t need a tire rotation or alignment yet. But I really don’t want to pay $500 for them to just say “by the way, you probably need new brakes”.

So if anyone could please provide me with some basic insight to what this 35k mile tune up is really for, that would be great! =D