/images/1041385860215607387/1192615980849971311/bach-luyen-thanh-tien-quyen-5-chuong-3195-ven-toan-doi-ben-y-dinh.txt?ex=65a9b92f&is=6597442f&hm=a49644b02b5a2db2e2065a2f33ab31fb31b7c999f3191c2499633338358f866a&