1 or above and Mathtype 6.7, with operators and many function symbols, you can type colored characters, but you can't draw;

2. The Geometer's Sketchpad is above 5.0, which can be used for drawing, moving, static, trajectory diagram, typing, colors, operators and function symbols.

3. There is also a program block diagram (which is also a kind of software) with different names and various formats and versions, which is generally used for making? Logical operation? The process is programmed and the computing language is automatically written.

Note: It is not a drawing software, but you can use the "screenshot" [PrtSc key] to take a screenshot, then paste it into the drawing software window, adjust the appropriate picture, and save it as a local file. PNG format, upload to this answer box, and "submit answer" to complete the answer.

The picture I sent is a download of the problem picture. Microsoft Office picture manager? (A more complete version of Microsoft Office 2003 or later components)? After "automatic correction" (clearer), open it on the drawing, copy the appropriate area-paste it on the "Geometry Sketchpad" and solve it in any combination-screen capture-drawing software-adjustment-saving (local file-PNG file first)-uploading-and display the results as you can see.

-I hope you like it *-~