lj4.tmac
.nr _C \n(.C .cp 0 . . .char \[or] \h'.1m'\Z'\D'l 0 -.675m''\h'.1m' . This is designed so that \[ul], \[rn], and \[br] form corners.
.char \[br] \Z'\v'.25m'\D'R .04m -1m'' .char \[rn] \Z'\v'-.77m'\D'R .54m .04m''\h'.5m' .char \[ul] \Z'\v'.23m'\D'R .54m .04m''\h'.5m' . .char \[ru] \Z'\v'-.02m'\D'R .54m .04m''\h'.5m' . .fchar \[OK] \s[\En[.s]*6u/10u]\[rs]\s[0]/ . .fchar \[sqrtex] \[radicalex] . .cp \n[_C] . .do mso latin1.tmac
.nr _C \n(.C .cp 0 . . .char \[or] \h'.1m'\Z'\D'l 0 -.675m''\h'.1m' . This is designed so that \[ul], \[rn], and \[br] form corners.
.char \[br] \Z'\v'.25m'\D'R .04m -1m'' .char \[rn] \Z'\v'-.77m'\D'R .54m .04m''\h'.5m' .char \[ul] \Z'\v'.23m'\D'R .54m .04m''\h'.5m' . .char \[ru] \Z'\v'-.02m'\D'R .54m .04m''\h'.5m' . .fchar \[OK] \s[\En[.s]*6u/10u]\[rs]\s[0]/ . .fchar \[sqrtex] \[radicalex] . .cp \n[_C] . .do mso latin1.tmac