What is the difference between "Neder" and "Nedavah"?
Rashi (Rosh ha'Shanah, 5b): 'Neder' is when the owner declares 'Harei Alai', in which case he must bring a Korban even if the animal that he subsequently designates dies or gets lost. 'Nedavah' is when he declares 'Harei Zu', in which case should the animal die or get lost, he is exempt
Since the Pasuk is coming to teach that whatever is leftover after the first day should be eaten on the second day, why is there a 'Vav' in "veha'Nosar"?
Rashi: The 'Vav' is superfluous. 1
Ramban (based on the Toras Kohanim): The Pasuk is saying that the owner eats the Shelamim on the first and on the second days, and then goes on to explain that l'Chatchilah he should eat all on the first day, but whatever remains after the first day, he should eat on the second.
Targum Yonasan: What the Pasuk means is that he should eat it on the first and on the second days, and that whatever remains, he should eat in the late afternoon. 2