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.
[[21, -93, 32, -78], [-15, 70, -129, -53], [82, 72, -82, -33, 86, -124], [-164, -143, -36, -147, 23, -66], [8, -172, -98, -200], [-180, -81, -161, 95], [99, -160, -120, -91, 21, 21]]