Where A' = not A, + equals or, AB= A*B

A'B'C'D'+A'BC'D'+A'B'CD+AB'CD'+A'BCD'+ABCD'+A'B'C'D+AB'C'D

If any one gets a chance and does it the commutative way the result should be AC+A'C'+B+D, I don't think you can simplify it that far using distributive. The Kmap answer is the same as outlined for commutative.

Please help someone,

Regards Aaron