1. If office software is used, Microsoft provides "Microsoft Formula 3.0" for mathematical formula input. The operation method is as follows:

(Menu) Insert-> Object-> (optional) Microsoft Formula 3.0

(If it is not installed, you can do the following: (Control Panel) Add and Remove Programs-> Microsoft Office-& gt； Change-> (Microsoft formula found. Probably in general tools)

2. Some special symbols and Chinese characters can adopt the method of "inserting symbols", as follows:

(Menu) Insert-> Symbol->; (Display all symbols provided by the system, including Chinese characters)

3. If there is a Chinese character internal code table, you can use the "position" input method to type special Chinese characters.