Could you please walk through the process step by step becau

Could you please walk through the process step by step, because I have the solution but don\'t understand what my professor did to get the answer :

Solution

let f(x) dx = dt

integral of 1 dt is t

from -2 to e^t is e^t - (-2 ) = e^t +2

d/dt (e^t +2 ) = e^t