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.
[[31, -90, -107, 86, -82], [7, -137, -144], [-148, 99, -167, 4], [-150, 69, -67, -36, -33, -89]]