rnfail017.hs:5:
    precedence parsing error
	cannot mix `(+)' [infixl 6] and prefix `-' [infixl 6] in the same infix expression

rnfail017.hs:6:
    precedence parsing error
	cannot mix `(*)' [infixl 7] and prefix `-' [infixl 6] in the same infix expression