1993 / 12346×12346-12345×12347的简便运算

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1993/12346×12346-12345×12347的简便运算1993/12346×12346-12345×12347的简便运算1993/12346×12346-12345×12347的简便运算1

1993 / 12346×12346-12345×12347的简便运算
1993 / 12346×12346-12345×12347的简便运算

1993 / 12346×12346-12345×12347的简便运算
1993/(12345+1)*(12347-1)-12345*12347
=1993/(12345*12347+12347-12345-1-12345*12347)
=1993/1
=1993

请问是1993除以后面的么?

1993/(12345+1)*(12347-1)-12345*12347
=1993/(12345*12347+12347-12345-1-12345*12347)
=1993/1
=1993