Update: It really does go without saying, the FX-CG50 is a beast of a calculator. But my trusty FX-991EX is still good for a lot of things. They are both good calculators. :
Tips and Tricks in the Casio fx-CG50 Equation Program | by harshanJawahar | Medium
Casio FX-CG50 Calculatrice Graphique avec écran Couleur Haute résolution + Manuel Calculatrice CALCUSO : Amazon.fr: Fournitures de bureau