Notice that the bounds are reverse. What does that 'do' to the way we evaluate area?
Two shifts happen to the integrand: It is shifted two units up. It is shifted two units right. The bounds also changed.
Shifting up 2 units is like adding the integral:
In other words, it's like adding a rectangle with height 2 and base (7 − 5).
Shifting an integral to the right could make it impossible to evaluate.
Fortunately, in this case, the bounds also shifted 2 units to the right.