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.
[[-151, -84], [76, -42, 40, 2, -57, 40, -120], [-161, -82, -172, -21, -60, -73, 47], [-47, -26, -120, 1, -142]]