Try me.

SELECT * FROM gallery2 WHERE topic_id="292731" UNION SELECT * FROM gallery2 WHERE topic_id="745311" UNION SELECT * FROM gallery2 WHERE topic_id="484031" UNION SELECT * FROM gallery2 WHERE topic_id="1382711" UNION SELECT * FROM gallery2 WHERE topic_id="520236" UNION SELECT * FROM gallery2 WHERE topic_id="1095286" UNION SELECT * FROM gallery2 WHERE topic_id="1124006" UNION SELECT * FROM gallery2 WHERE topic_id="1518218" UNION SELECT * FROM gallery2 WHERE topic_id="579104" UNION SELECT * FROM gallery2 WHERE topic_id="1327307" UNION SELECT * FROM gallery2 WHERE topic_id="1262446" UNION SELECT * FROM gallery2 WHERE topic_id="1202296" UNION SELECT * FROM gallery2 WHERE topic_id="1328272" UNION SELECT * FROM gallery2 WHERE topic_id="195368" UNION SELECT * FROM gallery2 WHERE topic_id="630951" UNION SELECT * FROM gallery2 WHERE topic_id="1104598"