24690/12346^2-12345*13247)

24690/12346^2-12345*13247) 12346^2-12345*12347分之24690=? 24690/12346-12345×12347 24690/12346²-12347*12345 算计：24690/(12346^2-12345*12347)要过程啊~~~~ 12345^2-12346^2 12346^2-12345*12347 12345*12348-12346*12346 12346+12345 12345的2次方-12344×12346= 12345除以12345又12346分之12345 123456²-12345×12347分之24690 12345²12344×12346＝?12345²-12344×12346＝? 12345²-12344*12346= 12346²-12345*12347= 12345×6789-12346×6799巧算 123454321/12345*12345-12346*12344= 12345*12345-12344*12346的简便计算