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, -136, 66, -80, -57, -176, 70], [-124, -59, 36, -113], [-47, -52, 8, -75, 56, 53, -137], [-183, 85, 97]]