# If you'd like to omit non-matching lines from the result; add ';d' to the end of the expression.
sed -E 's/^.*?\+?0*610?(\d{3})(\d{3})(\d{4})(?!\d).*$/+61 (0) $1 $2 $3/gm;t' <<< "xgsh6101231231234vvajxxgsh6101231231234vvajx
xgsh06101231231234vvajx
xgsh000006101231231234vvajx
+6101231231234
xgsh61012312312345vvajx
xgsh5101231231234vvajx
xgsh00000101231231234vvajx
xgsh6143545626455345601231231234vvajx
"
Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for SED, please visit: https://www.gnu.org/software/sed/manual/html_node/The-_0022s_0022-Command.html