2011²-2017
=2011²-2011-6
=(2011-3)×(2011+2)
=2008×2013
2011²+4019
=2011²+2011×2 -3
=(2011-1)×(2011+3)
=2010×2014
（2011²-2017）（2011²+4019）×2011／2008×2010×2013×2014
=2008×2013×2010×2014/2008×2010×2013×2014
=1