In this task, you are given a list. This list contains many lists of integers. The list is several items written within a []. Your task is to find the maximum number among the members of each inner list. The output should be a list comprised of the maximums with the same order as the internal lists.
[[49, -88, 58, -129], [-159, 34], [-39, -100, 41], [2, -159, 38, 47, -139, -109, -17]]