Methods of inserting mathematical symbols and formulas in PPT: Insert → Object → Microsoft? Formula? 3.0→ OK → Insert mathematical symbols and formulas.
This is a stupid way to go through such a process every time. In fact, there is a more convenient way, you need to insert the formula tool:
Tools → Customize → Command → Insert → Formula Editor (there is an icon under the root symbol in front) → Click Formula Editor with the left mouse button and drag it to the toolbar or menu bar.
In this way, every time you click the icon α under the root sign, you can enter mathematical symbols and formulas.
As shown in the attached drawings.