Simple (mf)

SELECT * FROM gallery2 WHERE topic_id="1660166" UNION SELECT * FROM gallery2 WHERE topic_id="1502268" UNION SELECT * FROM gallery2 WHERE topic_id="1281384" UNION SELECT * FROM gallery2 WHERE topic_id="109617" UNION SELECT * FROM gallery2 WHERE topic_id="916065" UNION SELECT * FROM gallery2 WHERE topic_id="1484975" UNION SELECT * FROM gallery2 WHERE topic_id="1398621" UNION SELECT * FROM gallery2 WHERE topic_id="1620872" UNION SELECT * FROM gallery2 WHERE topic_id="1654360" UNION SELECT * FROM gallery2 WHERE topic_id="670357" UNION SELECT * FROM gallery2 WHERE topic_id="584951" UNION SELECT * FROM gallery2 WHERE topic_id="1447755" UNION SELECT * FROM gallery2 WHERE topic_id="1290013" UNION SELECT * FROM gallery2 WHERE topic_id="1574688" UNION SELECT * FROM gallery2 WHERE topic_id="920766" UNION SELECT * FROM gallery2 WHERE topic_id="26100"