what iPad should I get for uni

I plan to do a degree in maths (if results day goes well), and I’m not sure which iPad I should get for taking notes.

I was thinking an iPad Pro 12.9” 3rd gen, but not sure if I actually need one that big for such an expensive price.

And the iPad Air 2020 or iPad 10.9” 2022 are also decent options I think, just not sure which one is the best choice.