Function Builder: math games

This is not a software that directly teaches you mathematical knowledge, but users can explore and think for themselves:
"How are functions organized?"
"How can simple functions be constructed into complex functions?",
"What is the skeleton of a complex function?"
"How does each component affect the final effect?"
......
Only when you think and understand the knowledge can you master it firmly, and it really becomes your own knowledge. I hope you can learn your own knowledge here. If you can do this, you will be very satisfied as a software developer.
Features:
1. Using drag to form functions is more suitable for exploring knowledge.
2. The details of each node provide three observation views to facilitate understanding how a variable affects the overall.
3. Provide vivid operation and demonstration scenes for some knowledge, which can make people master knowledge more deeply.