User blog comment:Jamazzzzzzzz/Bracket-A notation/@comment-36984051-20190530132734

let [k]_r = [k][k]....[k][k]. That is not well defined, because how many [k]’s are there in the latter expression? Also, what happens when the [1] is to the right of [b], where b>1?

Just trying to help you make a more well-defined notation.