(1/2013-1)*(1/2012-1)*(1/2011-1)*.*(1/3-1)*(1/2-1)
=(-1)^2012× (2012/2013)×(2011/2012)×(2010/2011)×.×2/3×1/2
=1×1/2013
=1/2013老师，（^）是什么东西啊？(-1)^2012
(-1)的2012次方