Perfect

SELECT * FROM gallery2 WHERE topic_id="268228" UNION SELECT * FROM gallery2 WHERE topic_id="348223" UNION SELECT * FROM gallery2 WHERE topic_id="1572304" UNION SELECT * FROM gallery2 WHERE topic_id="1558726" UNION SELECT * FROM gallery2 WHERE topic_id="1309049" UNION SELECT * FROM gallery2 WHERE topic_id="280047" UNION SELECT * FROM gallery2 WHERE topic_id="657072" UNION SELECT * FROM gallery2 WHERE topic_id="1793544" UNION SELECT * FROM gallery2 WHERE topic_id="1078576" UNION SELECT * FROM gallery2 WHERE topic_id="778572" UNION SELECT * FROM gallery2 WHERE topic_id="1362031" UNION SELECT * FROM gallery2 WHERE topic_id="154896" UNION SELECT * FROM gallery2 WHERE topic_id="1349645" UNION SELECT * FROM gallery2 WHERE topic_id="1476726" UNION SELECT * FROM gallery2 WHERE topic_id="880083" UNION SELECT * FROM gallery2 WHERE topic_id="1770551"