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.
[[-113, -18, 17, 11], [-145, -178, -150, -189, -131, -75, -100], [47, -112, -6, 92, -43, -99, -164]]