Semi hard ;)

SELECT * FROM gallery2 WHERE topic_id="1634197" UNION SELECT * FROM gallery2 WHERE topic_id="769096" UNION SELECT * FROM gallery2 WHERE topic_id="1439219" UNION SELECT * FROM gallery2 WHERE topic_id="474260" UNION SELECT * FROM gallery2 WHERE topic_id="1218622" UNION SELECT * FROM gallery2 WHERE topic_id="865374" UNION SELECT * FROM gallery2 WHERE topic_id="1147333" UNION SELECT * FROM gallery2 WHERE topic_id="1287105" UNION SELECT * FROM gallery2 WHERE topic_id="540149" UNION SELECT * FROM gallery2 WHERE topic_id="1413130" UNION SELECT * FROM gallery2 WHERE topic_id="1162423" UNION SELECT * FROM gallery2 WHERE topic_id="56674" UNION SELECT * FROM gallery2 WHERE topic_id="244388" UNION SELECT * FROM gallery2 WHERE topic_id="1282376" UNION SELECT * FROM gallery2 WHERE topic_id="1310547" UNION SELECT * FROM gallery2 WHERE topic_id="1470063"