text: const sum = (a, b) => a + b;
  const subtract = (a, b) => a - b;
  
  // these are kinda pointless I know, but it's just to simulate an async function
  const sumAsync = (...args) => Promise.resolve(sum(...args));
  const subtractAsync = (...args) => Promise.resolve(subtract(...args));
  
  module.exports = { sum, subtract, sumAsync, subtractAsync };
  