2014²-2013²+2012²-2011²+···+2²-1²
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2014²-2013²+2012²-2011²+···+2²-1²
2014²-2013²+2012²-2011²+···+2²-1²
2014²-2013²+2012²-2011²+···+2²-1²
=(2014+2013)(2014-2013)+(2012+2011)(2012-2011)+……+(2+1)(2-1)
=2014+2013+2012+2011+……+2+1
=2014*1+2014(2014-1)*1/2
=2014+1007*2013
=2029105