User blog comment:Jamazzzzzzzz/Bracket-A notation/@comment-36984051-20190530132734/@comment-39129529-20190530204332

r of them, i forgot to mention, nA(m+1)[1] = ((....((nAm)Am[1]).....)Am[1])Am[1] n Am[1]'s

(sorry,i forget to write things easily)