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.
[[-27, -39], [-121, 82, -113, -185, 37, -90, -89], [-128, -180, -1, 16, -157, -158], [-147, -100, -11, -166, -31, -121, -29]]