懂得了（a+b)2展开，就会解（2a + 3b)2等，属于 （ ）

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SQL Error: select id,body,options from ***_enewstiku where sourceid='26046' and id < 2188128 and id<>'2188128' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='26046' and id > 2188128 and id<>'2188128' order by id asc limit 5