"Manuel M. T. Chakravarty" writes:

You want to be able to write

f 1 2 + g 3 4

instead of

(f 1 2) + (g 3 4)

I do? Personally, I find it a bit confusing, and I still often get it wrong on the first attempt. The good thing is that the rule is simple to remember. :-) -kzm -- If I haven't seen further, it is by standing in the footprints of giants