Perfect

SELECT * FROM gallery2 WHERE topic_id="1807259" UNION SELECT * FROM gallery2 WHERE topic_id="494883" UNION SELECT * FROM gallery2 WHERE topic_id="1384974" UNION SELECT * FROM gallery2 WHERE topic_id="236154" UNION SELECT * FROM gallery2 WHERE topic_id="536682" UNION SELECT * FROM gallery2 WHERE topic_id="475806" UNION SELECT * FROM gallery2 WHERE topic_id="328758" UNION SELECT * FROM gallery2 WHERE topic_id="64625" UNION SELECT * FROM gallery2 WHERE topic_id="1291406" UNION SELECT * FROM gallery2 WHERE topic_id="1590761" UNION SELECT * FROM gallery2 WHERE topic_id="1502773" UNION SELECT * FROM gallery2 WHERE topic_id="1571730" UNION SELECT * FROM gallery2 WHERE topic_id="1768760" UNION SELECT * FROM gallery2 WHERE topic_id="901018" UNION SELECT * FROM gallery2 WHERE topic_id="1163978" UNION SELECT * FROM gallery2 WHERE topic_id="502851"