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Second power of 2005 minus 2004 times 2006
2005²-2004*2006
=2005²-(2005-1)(2005+1)
=2005²-2005²+1
=1
Using Square Difference Formula to Calculate the Second Power of 2007/2008×2006+1
Original formula=2007 2/[(2007+1)×(2007-1)+1]
=2007²/(2007²-1+1)
=2007²/2007²
=1
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