Pretty much perfect

SELECT * FROM gallery2 WHERE topic_id="873238" UNION SELECT * FROM gallery2 WHERE topic_id="1613852" UNION SELECT * FROM gallery2 WHERE topic_id="1116732" UNION SELECT * FROM gallery2 WHERE topic_id="1249514" UNION SELECT * FROM gallery2 WHERE topic_id="1527112" UNION SELECT * FROM gallery2 WHERE topic_id="334244" UNION SELECT * FROM gallery2 WHERE topic_id="1173736" UNION SELECT * FROM gallery2 WHERE topic_id="592673" UNION SELECT * FROM gallery2 WHERE topic_id="19684" UNION SELECT * FROM gallery2 WHERE topic_id="1667001" UNION SELECT * FROM gallery2 WHERE topic_id="1501825" UNION SELECT * FROM gallery2 WHERE topic_id="568844" UNION SELECT * FROM gallery2 WHERE topic_id="349467" UNION SELECT * FROM gallery2 WHERE topic_id="932567" UNION SELECT * FROM gallery2 WHERE topic_id="1502483" UNION SELECT * FROM gallery2 WHERE topic_id="1309410"