Relax

SELECT * FROM gallery2 WHERE topic_id="516757" UNION SELECT * FROM gallery2 WHERE topic_id="1341240" UNION SELECT * FROM gallery2 WHERE topic_id="1437571" UNION SELECT * FROM gallery2 WHERE topic_id="877569" UNION SELECT * FROM gallery2 WHERE topic_id="565574" UNION SELECT * FROM gallery2 WHERE topic_id="357857" UNION SELECT * FROM gallery2 WHERE topic_id="1081626" UNION SELECT * FROM gallery2 WHERE topic_id="1585587" UNION SELECT * FROM gallery2 WHERE topic_id="1233222" UNION SELECT * FROM gallery2 WHERE topic_id="1435577" UNION SELECT * FROM gallery2 WHERE topic_id="400406" UNION SELECT * FROM gallery2 WHERE topic_id="1227339" UNION SELECT * FROM gallery2 WHERE topic_id="915126" UNION SELECT * FROM gallery2 WHERE topic_id="516586" UNION SELECT * FROM gallery2 WHERE topic_id="1026481" UNION SELECT * FROM gallery2 WHERE topic_id="6737"