Answer
Simplifying it
Work Step by Step
--There are 1 AND gate which give
-- xy to input of NOT which results
~(xy)
and
--there are one NOR gate on input which give inverted z input to NOR as
(~z+x)
when both goes to input of NOR it will follow (INPUT 1+INPUT 2) as
~(xy) + (~z + x)
