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.
[[-88, -78, -21], [-154, -184, -116, -32, -111, -121], [-14, -137, -43, -117], [-75, 38, -76, -138, -108, -102, 42], [12, -66, -91, 100, -55, 2]]