'How to write SQL where clause with more AND and one OR conditions

I am not sure about the where clause in my SQL query. It is composed from more AND conditions and one Or condition. Now I have this

SELECT * FROM aaa 
WHERE server_id = 'xxx'
   OR (server_id != 'yyy' AND server_id != 'zzz' AND country != 'aaa' AND country != 'bbb')

I am not sure about that parenthesis. Is it neccesary or not?

mysql sql where-clause

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