This is a game with math written to ruby & bash programming language for support(revival) your calculation.
git clone https://github.com/DearMad/Math_Game.git
sudo apt install ruby
cd Math_Game ; chmod +x installer
./installer.
chmod +x uninstaller
./uninstaller
thanks to https://github.com/mohammadali-sdt & https://github.com/pouya-abbasian & All Members Of gCs-TM...