Bash Script - egrep missing... How do to do it with grep

Hello everybody,

Thanks to woolmilkporc I have a script with this lines (original thread was

aa=$(egrep "<title>|<link>|<description>" rss.xml |awk -F"<|>" '{print $3}' | grep -B1 "$1" | grep -v "$1")
bb=$(egrep "<title>|<link>|<description>" rss.xml |awk -F"<|>" '{print $3}' | grep -A1 "$1" | grep -v "$1")

Which workes really good on a system with egrep... But now I also have a system that does not even have egrep :( So I wanted to ask how to modify those lines that it works without egrep?

Thanks a lot for your help
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use grep -E


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awk -F"<|>" '/<title>|<link>|<description>/{print $3}' rss.xml
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