Specific operation methods (taking Word20 16 as an example):
1. First, click the Insert option in the Word document.
2. Select the formula option in the Insert tab.
3. Open the drop-down menu to select the built-in formula or click "Insert New Formula".
4. You can insert the style of formula structure according to the structure in the formula.
5. You can also select "symbol" to edit complex mathematical formulas as needed.