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.
[[91, -82, -158, -188], [-148, -168, 25, 53], [-87, 82], [-176, -136, -24, -72, -9, -12]]