get records params: select a range of collecion id

Hi, I do use get_records to get all the record of one collection, this way

$get_opt["collection_id"] = 2;

$params = array_merge($get_opt);

$items = get_records('item', $params ,1000000);

It works, but my real goal is to get record from collection_id 1, 2 and 3, or exclude one collection id.

How can I do that ?

Thanks a lot