P: left parenthesis, left parenthesis, 6 "s" plus 27 , right parenthesis Superscript, 1 third , Baseline minus 3 , left parenthesis, left parenthesis, 6 "s" plus 27 , right parenthesis Superscript, 1 third , Baseline minus 2 , right parenthesis squared , right parenthesis6s+2713−3,6s+2713−22