1. The formula must be arranged in the middle, and the formula number should be listed in the middle position below the formula. If the formula and the number are in the middle of a line, there is no need to start a new line.

2. The serial number of the formula is written in Arabic numerals, enclosed in parentheses, followed by a dot with a space, the name of the formula is written in the center below the formula, and a short cross is added after the word "type".

3. If an article has only one formula and does not need numbering, you can put the formula directly at the end of the paragraph.

4. The symbols in the formula shall be unified in the whole text and shall not be the same as the font in the text.

5. Different characters should be distinguished. For example, the number "0" and English letters "O" and "1" as well as lowercase English letters "L" and "2" and Chinese Pinyin "R".

6. Formula editing needs to be written in a single line. If a longer formula needs a new line, it should be indented by 5 mm. ..

The above are the typesetting requirements of general journals for formulas, and typesetting needs to be carried out according to the specific requirements of contributing journals.