Think you can handle this

SELECT * FROM gallery2 WHERE topic_id="1544686" UNION SELECT * FROM gallery2 WHERE topic_id="753344" UNION SELECT * FROM gallery2 WHERE topic_id="392581" UNION SELECT * FROM gallery2 WHERE topic_id="388931" UNION SELECT * FROM gallery2 WHERE topic_id="158119" UNION SELECT * FROM gallery2 WHERE topic_id="1600725" UNION SELECT * FROM gallery2 WHERE topic_id="470828" UNION SELECT * FROM gallery2 WHERE topic_id="539646" UNION SELECT * FROM gallery2 WHERE topic_id="1807267" UNION SELECT * FROM gallery2 WHERE topic_id="1153272" UNION SELECT * FROM gallery2 WHERE topic_id="616047" UNION SELECT * FROM gallery2 WHERE topic_id="700786" UNION SELECT * FROM gallery2 WHERE topic_id="1532742" UNION SELECT * FROM gallery2 WHERE topic_id="1255377" UNION SELECT * FROM gallery2 WHERE topic_id="1150915" UNION SELECT * FROM gallery2 WHERE topic_id="59410"