[racket] What math do you want to do in Racket?

Slightly off-topic propably, but to be able to create generic math user
interfaces easily (for non-racketeers), infix->prefix and prefix->infix
helpers would be great.

Infix->prefix should be tolerant to expected human-input variations (e.g.
white space usage, math-symbol variants), and the output in both should be
"the recommended way".

I know some converters exist, but IIRC these only go half ways in some
aspects.

br, jukka