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.
[[33, -102, -126], [19, -121, -5, -173, -65], [-71, -73, 92, -129], [-6, 56, 37, 13]]