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.
[[20, -151, -171, -144, -120], [60, 47], [-141, -164, 26, 56, -140, 46, -15]]