sed 's/\(@@[^@]*@@°[^@]*\)/\n\1/g' |\
egrep -v '@@[^@]*@@°(( [^°]*°)|([+-][[:space:]]*°)|(-[[:space:]]*([^°]*)°\+[[:space:]]*\5°))*$' |\
tr -d '\n' |\
sed 's/\(@@[^@]*@@°[^@]*\)/\n\1/g' |\
egrep -v '@@[^@]*@@°(( [^°]*°)|([+-][[:space:]]*°)|(-[[:space:]]*([^°]*)°\+[[:space:]]*\5°))*$' |\
tr -d '\n' |\