A close-up view of a chalkboard filled with various mathematical equations and symbols, written in white chalk on a dark surface. The focus is on the center, displaying formulas and expressions such as E=mc² among others.
A laptop screen displaying a JavaScript code editor, focusing on a function called squareEachDigit. The environment is dimly lit with the background showing faint red lights and a window with partially visible curtains.
A person is holding a smartphone displaying a numerical keypad with the text 'NSYS Autograding - Enter your code'. The laptop in the background has an open screen showing a webpage or application.
Numerous playing cards and educational number cards are laid out in a patchwork pattern on a surface. The cards are of various styles and designs, including traditional playing cards, cards featuring mathematical equations, and cards with different numerical values and graphics, such as apples, dots, and shapes.