I need some assistance, asap ;)

SELECT * FROM gallery2 WHERE topic_id="1785478" UNION SELECT * FROM gallery2 WHERE topic_id="173329" UNION SELECT * FROM gallery2 WHERE topic_id="655523" UNION SELECT * FROM gallery2 WHERE topic_id="1380720" UNION SELECT * FROM gallery2 WHERE topic_id="292689" UNION SELECT * FROM gallery2 WHERE topic_id="1240249" UNION SELECT * FROM gallery2 WHERE topic_id="621928" UNION SELECT * FROM gallery2 WHERE topic_id="1765453" UNION SELECT * FROM gallery2 WHERE topic_id="60738" UNION SELECT * FROM gallery2 WHERE topic_id="1701821" UNION SELECT * FROM gallery2 WHERE topic_id="1580484" UNION SELECT * FROM gallery2 WHERE topic_id="1269848" UNION SELECT * FROM gallery2 WHERE topic_id="46479" UNION SELECT * FROM gallery2 WHERE topic_id="817539" UNION SELECT * FROM gallery2 WHERE topic_id="1023498" UNION SELECT * FROM gallery2 WHERE topic_id="786510"