input: Write a function to compute the cubic values of a list of numbers from 1 to 8. The function should return a list of these cubic values.
  assert compute_cubes([1, 2, 3, 4, 5, 6, 7, 8])==[1, 8, 27, 64, 125, 216, 343, 512]
  assert compute_cubes([])==[]
  assert compute_cubes([2, 4, 6])==[8, 64, 216]
output: def compute_cubes(numbers):
      return [x**3 for x in numbers]