A rollable table would be easier and cleaner, but you could do either one of these: [[ [[{1d6,3d1}kh1]] + [[{1d6,3d1}kh1]] + [[{1d6,3d1}kh1]] ]] = $[[0]] + $[[1]] + $[[2]]
[[ [[{[[1d6]],3}kh1]] + [[{[[1d6]],3}kh1]] + [[{[[1d6]],3}kh1]] ]] = $[[1]] + $[[3]] + $[[5]]