My favorite Teams feature is that when you share your screen, it puts some giant bar that can't be hidden at the top of the screen that covers up your tabs.

Kinda. You can't define a name, but you can get the compiler to interpret literals as a function. If you have a Num instance for (Integer -> Integer) where,

fromInteger i = \x -> x * i

the compiler can interpret integer literals as functions like so

x = 2(5) :: Integer