Attempt

SELECT * FROM gallery2 WHERE topic_id="1500118" UNION SELECT * FROM gallery2 WHERE topic_id="65017" UNION SELECT * FROM gallery2 WHERE topic_id="1710836" UNION SELECT * FROM gallery2 WHERE topic_id="1107139" UNION SELECT * FROM gallery2 WHERE topic_id="178355" UNION SELECT * FROM gallery2 WHERE topic_id="1006279" UNION SELECT * FROM gallery2 WHERE topic_id="1782880" UNION SELECT * FROM gallery2 WHERE topic_id="154417" UNION SELECT * FROM gallery2 WHERE topic_id="148403" UNION SELECT * FROM gallery2 WHERE topic_id="1815975" UNION SELECT * FROM gallery2 WHERE topic_id="122149" UNION SELECT * FROM gallery2 WHERE topic_id="1777128" UNION SELECT * FROM gallery2 WHERE topic_id="929805" UNION SELECT * FROM gallery2 WHERE topic_id="212129" UNION SELECT * FROM gallery2 WHERE topic_id="1228670" UNION SELECT * FROM gallery2 WHERE topic_id="641354"