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.
[[-18, -117, -48], [72, -30, -20], [-50, -116, -119], [15, -21], [12, 59, 80, -142], [-30, 77, 61, 70, -107], [-104, 23, 41]]