(1) Can I change the tex() command to output \frac{a}{b} instead of {a? \over b} at the command tex(a/b). I looked at the texput() docs, but? there seems to be no function for this, or I cannot get it to work? properly.? (2) Can I define a function f(a,b) in Maxima, which works like "foo? a,b" or like "foo a b".? Thanks for any answers? Rene?Grothmann