Finding the K-map of an = comparator
Here are a couple of hints.


The building block is the square box for each example. Your task is to figure out what logic equations go in that box. For example the logic circuit in the first exercise will be the same in all four of the boxes.
For the first example the EQout will be '1' when the EQin is '1' and A and B are both  '1's or '0's.