T14643a.hs:5:14: warning: [-Wpartial-type-signatures (in -Wdefault)]
    • Found type wildcard ‘_’ standing for ‘()’
    • In the type signature: af :: (Num a, _) => a -> a

T14643a.hs:8:14: warning: [-Wpartial-type-signatures (in -Wdefault)]
    • Found type wildcard ‘_’ standing for ‘()’
    • In the type signature: ag :: (Num a, _) => a -> a