[1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
  .filter(num => num % 2 !== 0) // [1, 3, 5, 7, 9]
  .map(num => (num + 1) * 2) // [4, 8, 12, 16, 20]
  .reduce((sum, num) => sum + num, 0) // 60