Answer
Reflection across the x-axis, followed by a vertical shift up three units.
Work Step by Step
There are two key changes here, the sign on the exponential term is changed from positive to negative, and there is a +3 at the end.
The first change is indicative of a vertical flip, or a reflection over the x-axis.
The second change is indicative of a vertical shift of +3. Note that the sign change does not apply to the +3, so it can be said that the reflection is followed by the vertical shift up three units.