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.
[[23, -73], [100, 45, -156, 72], [80, 94], [-102, -141], [-89, 90, -148, 12, -123]]