1. Download and install math tool 5.6, in which the "arc" function allows you to quickly input arc symbols. When you enter a letter representing an arc (for example, enter the letter "AB"), select these two letters and click the "Arc" button, and the letter will be converted into an arc symbol.
2. Download and install WPS Chinese processing software, and you can completely insert an arc (mathematical formula-top logo-arc) into WPS.