The code for that calculator is generally not that bad, but it lacks clues what the symbols are. In Common Lisp there are conventions for example that +foo+ is

The code for that calculator is generally not that bad, but it lacks clues what the symbols are. In Common Lisp there are conventions for example that +foo+ is a constant, that WITH-SOMETHING is a scoping macro, etc. It also uses longer function names and single letter variable names. That's a strange mix. One problem with the code though is the layout/formatting. This is not what I would expect as a Lisp user. I would expect to be able to see more block structure from the code layout: (define (number->neatstring n) (if (not (##flonum? n)) (number->string n) (let* ((s (number->string (fl/ (flfloor (fl+ (fl* (flo n) 1.0e10) 0.5)) 1.0e10))) (sl (string-length s)) (b (substring s 0 1)) (e (substring s (- sl 1) sl))) (string-append (if (string=? b ".") "0" "") (if (string=? e ".") (substring s 0 (- sl 1)) s))))) If I have a function call with 2 args I don't want: (long-function-name long-expression-1 long-expression-2) because that's what macros with a body would be formatted. I would want either (long-function-name long-expression-1 long-expression-2) or (long-function-name long-expression-1 long-expression-2) Both tell me that both expressions are on the same level syntactically and semantically: both are function arguments.