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.
[[-145, -114, -151, -89, -166, -189, -117], [-20, -68], [-64, 52, 65]]