input: Write a python function to calculate the maximum value from a list of three numbers using different operators.
  assert maxValue([10, 5, 3]) == 15.0
  assert maxValue([4, 2, 1]) == 8
  assert maxValue([8, 2, 2]) == 16
output: def maxValue(nums):
      a, b, c = nums
      return max(a + b + c, a * b * c, a + b * c, a * b + c, a - b - c, a - b * c, a * b - c, a / b / c, a / b * c, a * b / c)