Power 2007 of (- 0.5) * power 2008 of 4 (power n of 2x) (power n of 2x)

（-0.5）^2007*4^2008
=（-0.5）^2007*4^2007*4
=(-0.5*4)^2007*4
=(-2)^2007*4
=-2^2007*2²
=-2^2009

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