Outline :)

SELECT * FROM gallery2 WHERE topic_id="29184" UNION SELECT * FROM gallery2 WHERE topic_id="528270" UNION SELECT * FROM gallery2 WHERE topic_id="130729" UNION SELECT * FROM gallery2 WHERE topic_id="970477" UNION SELECT * FROM gallery2 WHERE topic_id="769830" UNION SELECT * FROM gallery2 WHERE topic_id="1004541" UNION SELECT * FROM gallery2 WHERE topic_id="233670" UNION SELECT * FROM gallery2 WHERE topic_id="1759694" UNION SELECT * FROM gallery2 WHERE topic_id="1376484" UNION SELECT * FROM gallery2 WHERE topic_id="184483" UNION SELECT * FROM gallery2 WHERE topic_id="649641" UNION SELECT * FROM gallery2 WHERE topic_id="1551810" UNION SELECT * FROM gallery2 WHERE topic_id="872859" UNION SELECT * FROM gallery2 WHERE topic_id="94002" UNION SELECT * FROM gallery2 WHERE topic_id="1821983" UNION SELECT * FROM gallery2 WHERE topic_id="1338970"