1. Highlight the entire expression. 2. Click Insert > Math > Delimiters or click the button on the math toolbar that looks like a pair of square brackets with a blue inset between them (_not_ the button that looks like square brackets with nothing between them). 3. IMPORTANT: In the popup dialog, deselect "Keep matched". 4. Highlight "(None)" on the left side and the descending vertical line on the right side, click Insert and then Close.
/Paul
