First set an empty folder on the desk top.
Secondly click Step 1 and save it in the folder. Repeat the same operation with Step 2 and Step 3, and save them in the same folder.

Click [setup] in the folder that contains three of above. Then in Start Menu

[Quadratic curve] as one of sub menus
of the main menu [Mathematical Woders]

is addedB (You may delete the used folder after installation.)

Click [Return] if you want to download another program.