How to query tasks excluding multiple tags?

Hi, I tried to query the tasks excluding 1 specific tag, it’s working.
However if I want to excluding 2 specific tags, it’s not working.
source code:

{{query (and (task DOING) (not [[fn]]))}}
{{query (and (task DOING) (not [[fn]] [[ds]]))}}

screenshot:

Welcome. Try this syntax: {{query (and (task DOING) (not [[fn]] ) (not [[ds]] ) ) }}

Thank you, it worked