(√5-2）^2007×(√5+2)^2007×(√5+2)
=[(√5-2)(√5+2)]^2007×(√5+2)
=[(√5)²-2²]^2007×(√5+2)
=(5-4)^2007×(√5+2)
=1^2007×(√5+2)
=√5+2