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, .,53 =, ,15,78 =,56, ,155 =,3,567 =,8,(15 5 ), ,(56 7 ),2. ,484=,363=,8404=,2005=,2709=,402=,12,12,210,40,30,80,304=,120,1829,600,902=,180,3130,900, , : 204 =80 8020=4 ., : 82 = 4 8 2 4 . 80204,8020 =,4（）,: 4 ., ,1, 80 ., 20 ,82=4,8020=4,80, . ., :, ,:,8320,8019,83 80 8020=4 83204,19 20 8020=4 80194,4,4, :, .,6020=,9030=,8040=,6220 ,9330 ,8038 ,3,3,3,3,2,2,90,60,40,120 ., , ., .123 = 4 12 3 4 .,12030 =,4（）,: 4 ., 30 ,12230 12028,4,4, ., ,12230,12028,122 120 12030=4 . 122304,4,4, , .,28 30 12030=4 . 120284,18030=,24040=,18430,42060=,6,6,7,24037,42058,6,7,6,: 80- 13- , ,
