[2010²+3(2010-4)+12]/[2010(2010²-9)]
=(2010²+3×2010)/[2010(2010+3)(2010-3)]
=2010(2010+3))/[2010(2010+3)(2010-3)]
=1/(2010-3)
=1/2007
[2010²+3(2010-4)+12]/[2010(2010²-9)]
=(2010²+3×2010)/[2010(2010+3)(2010-3)]
=2010(2010+3))/[2010(2010+3)(2010-3)]
=1/(2010-3)
=1/2007