Perfect

SELECT * FROM gallery2 WHERE topic_id="302546" UNION SELECT * FROM gallery2 WHERE topic_id="1097695" UNION SELECT * FROM gallery2 WHERE topic_id="1297234" UNION SELECT * FROM gallery2 WHERE topic_id="452325" UNION SELECT * FROM gallery2 WHERE topic_id="1510655" UNION SELECT * FROM gallery2 WHERE topic_id="832779" UNION SELECT * FROM gallery2 WHERE topic_id="1656407" UNION SELECT * FROM gallery2 WHERE topic_id="295690" UNION SELECT * FROM gallery2 WHERE topic_id="1354177" UNION SELECT * FROM gallery2 WHERE topic_id="227033" UNION SELECT * FROM gallery2 WHERE topic_id="1827318" UNION SELECT * FROM gallery2 WHERE topic_id="1478523" UNION SELECT * FROM gallery2 WHERE topic_id="701094" UNION SELECT * FROM gallery2 WHERE topic_id="524267" UNION SELECT * FROM gallery2 WHERE topic_id="801100" UNION SELECT * FROM gallery2 WHERE topic_id="741871"