[[ref:ex]]　[[ref:q]]　[[ref:num]]　[[ref:per]]　[[ref:and]]　[[ref:or]]　 [[ref:plus]]　[[ref:minus]]　[[ref:ast]]　[[ref:slash]]　[[ref:hat]]　[[ref:sq]]　 [[ref:period]]　[[ref:comma]]　[[ref:langl]]　[[ref:rangl]]　[[ref:eq]]　[[ref:tilde]]　 [[ref:dollar]]　[[ref:at]]　[[ref:under]]　[[ref:lbr…