Question

A core change unique to formal operations is that teens can: read at a much higher level. conserve much better. really take another person's point of view. reason abstractly about hypothetical possibilities.

Answer 1

In Piaget's Formal Operations stage, teens are able to "reason abstractly about hypothetical possibilities".  An example of this is being able to complete abstract mathematical algorithms or problems without a concrete model.  Teens are also able to think creatively in this stage.