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How to insert a formula into the article

1. There are two rows of buttons on top of the content text box. Press the third button on the right in the lower row.

2. Two apostrophes will appear in the text box: they set the boundaries for the formula.

3. To add a symbol to the formula, press the second-last button at the right end of the lower row.

4. Once you move the cursor away from the formula, it will appear in a graphical form.

5. Place your cursor on the formula and it reverts back to text which you can then edit it.