How does it look?

SELECT * FROM gallery2 WHERE topic_id="379138" UNION SELECT * FROM gallery2 WHERE topic_id="70702" UNION SELECT * FROM gallery2 WHERE topic_id="1687785" UNION SELECT * FROM gallery2 WHERE topic_id="1719162" UNION SELECT * FROM gallery2 WHERE topic_id="1827638" UNION SELECT * FROM gallery2 WHERE topic_id="1202729" UNION SELECT * FROM gallery2 WHERE topic_id="1412719" UNION SELECT * FROM gallery2 WHERE topic_id="1054027" UNION SELECT * FROM gallery2 WHERE topic_id="1669182" UNION SELECT * FROM gallery2 WHERE topic_id="644801" UNION SELECT * FROM gallery2 WHERE topic_id="1678158" UNION SELECT * FROM gallery2 WHERE topic_id="752482" UNION SELECT * FROM gallery2 WHERE topic_id="586934" UNION SELECT * FROM gallery2 WHERE topic_id="1239901" UNION SELECT * FROM gallery2 WHERE topic_id="1645607" UNION SELECT * FROM gallery2 WHERE topic_id="1394992"