20123-2*20122+1/20123-3*2

20123-2*20122+1/20123-3*2012+2012+2

2个回答

(2012³-2*2012²+1)/(2012³-3*2012²+2012+2)
=[(2012-1)(2012²-2012-1)]/[(2012-2)(2012²-2012-1)]
=(2012-1)/(2012-2)
=2011/2010