Slight point, these aren't actually the F-keys, they are the second function of the F-Keys. By default to use the F-keys you have to press the 'fn' button in conjunction with the key. With that point made the original expose shortcuts are given below
fn+F8 = spaces
fn+F9 = All windows
fn+F10 = All application windows
fn+F11 = Show desktop
fn+f12 = Dashboard