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.
[[-150, 46, 0], [42, -91], [-76, -22, 21], [11, 13, -25, -12]]