$ awk -F '<\/td><td>' 'BEGIN{OFS=FS;} {gsub (/<font style=BACKGROUND-COLOR:red>/,"",$4); gsub (/<\\/font>/,"",$4);}1' hm
awk: warning: escape sequence `\/' treated as plain `/'
awk: cmd. line:1: BEGIN{OFS=FS;} {gsub (/<font style=BACKGROUND-COLOR:red>/,"",$4); gsub (/<\\/font>/,"",$4);}1
awk: cmd. line:1: ^ unterminated regexp