绝对值根号5-根号6+根号下(根号5-2)^2-根号下(根号6-3)^2
=根号6-根号5+根号5-2-(3-根号6)
=根号6-根号5+根号5-2-3+根号6
=√6-√5+√5-2-3+√6
=2√6-5