sed 's#<table:named-expressions/>#<table:table-row table:style-name="ro1"><table:table-cell office:value-type="string" calcext:value-type="string"><text:p>a2a2a2</text:p></table:table-cell><table:table-cell office:value-type="string" calcext:value-type="string"><text:p>b2b2b2</text:p></table:table-cell></table:table-row>&#'