Janos Blazi wrote: > (/ (+ (- b) (sqrt ( - (* b b) (* 4 (* a c))))) (* 2 a)) > > ot something like that (I have not checked if the formula is correct) still > looks messy and I wonder if practicing would help. (/ (+ (- b) (sqrt (- (* b b) (* 4 a c)))) (* 2 a)) What you need is not a pratice, just a decent editor. abe -- keke at mac com