Something simple

SELECT * FROM gallery2 WHERE topic_id="1321758" UNION SELECT * FROM gallery2 WHERE topic_id="93230" UNION SELECT * FROM gallery2 WHERE topic_id="1453618" UNION SELECT * FROM gallery2 WHERE topic_id="171715" UNION SELECT * FROM gallery2 WHERE topic_id="599429" UNION SELECT * FROM gallery2 WHERE topic_id="1144179" UNION SELECT * FROM gallery2 WHERE topic_id="1413444" UNION SELECT * FROM gallery2 WHERE topic_id="1319579" UNION SELECT * FROM gallery2 WHERE topic_id="418419" UNION SELECT * FROM gallery2 WHERE topic_id="1031878" UNION SELECT * FROM gallery2 WHERE topic_id="255623" UNION SELECT * FROM gallery2 WHERE topic_id="924088" UNION SELECT * FROM gallery2 WHERE topic_id="1627588" UNION SELECT * FROM gallery2 WHERE topic_id="922070" UNION SELECT * FROM gallery2 WHERE topic_id="529097" UNION SELECT * FROM gallery2 WHERE topic_id="205377"