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Use mathematical formulas when writing graduation thesis. In what input state are letters entered? Because some are italicized and some are normal.
Use the formula editor to edit a mathematical formula, as follows:

1. First, open the graduation thesis document, click the cursor where the mathematical formula needs to be entered, and click "Insert" in the document menu bar;

2. Click Insert, find "Formula" under the Insert menu, and click;

3. After clicking the formula, the formula editor window will automatically pop up, where users can edit the formula;

4. Use various operation symbols provided in the formula editor to assist the keyboard to edit the formula;

5. After editing, click the Close button in the upper right corner of the formula editor to complete the editing. If you need to modify it, you can click the formula in the document and directly enter the formula editor to modify it.