User blog comment:Alejandro Magno/PLEASE. MAKE. AN. EASIER. RULESET. OF. POUND. STAR. NOTATION./@comment-1605058-20141012194220/@comment-1605058-20141012200455

Then you should put some effort in it, for example, write down some example expression and try to reduce it by closely following the rules. SJ224 has made a complete definition, and it's your problem that you seem to not try hard enough to understand it.