easy

SELECT * FROM gallery2 WHERE topic_id="1034363" UNION SELECT * FROM gallery2 WHERE topic_id="1770174" UNION SELECT * FROM gallery2 WHERE topic_id="2783" UNION SELECT * FROM gallery2 WHERE topic_id="21086" UNION SELECT * FROM gallery2 WHERE topic_id="1687135" UNION SELECT * FROM gallery2 WHERE topic_id="1418982" UNION SELECT * FROM gallery2 WHERE topic_id="1026290" UNION SELECT * FROM gallery2 WHERE topic_id="1789071" UNION SELECT * FROM gallery2 WHERE topic_id="533012" UNION SELECT * FROM gallery2 WHERE topic_id="1222210" UNION SELECT * FROM gallery2 WHERE topic_id="652714" UNION SELECT * FROM gallery2 WHERE topic_id="1237856" UNION SELECT * FROM gallery2 WHERE topic_id="901576" UNION SELECT * FROM gallery2 WHERE topic_id="109395" UNION SELECT * FROM gallery2 WHERE topic_id="607780" UNION SELECT * FROM gallery2 WHERE topic_id="291947"