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2006X2008X(1/200X2008)+(1/2007X2008)=
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2006X2008X(1/200X2008)+(1/2007X2008)=
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2006×2008×(1/2007×2008)+(1/2007×2008)
= 2006/2007+(1/2007×2008)
= (1-1/2007)+(1/2007-1/2008)
= 1-1/2008
= 2007/2008
= 2006/2007+(1/2007×2008)
= (1-1/2007)+(1/2007-1/2008)
= 1-1/2008
= 2007/2008
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