# [racket] Writing algebraic maths expressions

On Mar 7, 2015, at 7:11 AM, Norman Gray <norman at astro.gla.ac.uk> wrote:
>* Another possibility is Sweet expressions, as described at <http://pkg-build.racket-lang.org/doc/sweet/index.html> and <http://readable.sourceforge.net>. That feels plausible, but (i) the port doesn't seem complete, since when I try:
*>*
*>* #lang sweet-exp racket/base
*>*
*>* let
*>* \\
*>* a 1
*>* *(a a)
*
>* (see <http://sourceforge.net/p/readable/wiki/Scheme-tutorial/>, at 'Grouping and Splitting'), I get 'let: bad syntax (not an identifier and expression for a binding) in: |\\|’.
*
For this, sweet-exp uses `group` instead of `\\`.
#lang sweet-exp racket
let
group
a 1
b 2
{a + b}