tcfail044.hs:12: No instance for:
		     `PrelBase.Eval (a{-a19I-} -> a{-a19I-})'
    tcfail044.hs:12:
	in an instance declaration
    When checking superclass constraints of an instance declaration
 
tcfail044.hs:20: No instance for:
		     `PrelBase.Eval (PrelBase.Float -> PrelBase.Float)'
    tcfail044.hs:20:
	at a use of an overloaded identifier: `PrelBase.+'


Compilation had errors