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RE: various recent ll1 threads
> For example, several weeks ago someone sent me some email
> containing the expression "(+ (* b b) (* 4 a c))"
> and my mind merely said, "Ah, yes, the quadratic discriminant";
> when I re-read the email the next day, I was actually surprised
> to see it was in prefix form, because I had "misremembered" its content
> as "b*b - 4*a*c".
Sorry, I had a typo: should have been "(- (* b b) (* 4 a c))".