This example demonstrates a set of JavaScript functions for basic arithmetic and variable assignment, with results logged to the browser console. It shows how arrow functions like `add` and `sub` compute sums and differences, while the `copy` and `dup` functions illustrate function aliasing. The code uses plain JavaScript without any external libraries or frameworks, embedded directly in an HTML page with a large 13em body text style. The rendering approach is entirely console-based, with no visual data output.