So if I am trying to calculate, let me write it as e to the five, or actually 6 5ths t, 12 tenths is the same thing as 6 5ths, 6 5ths t dt. So this is an indefinite integral. I'm just trying to figure out the antiderivative here. Well, if I had a 6 5ths right over here, then u substitution, or sometimes you would say the inverse chain rule, would be very appropriate. Well, we could put a 6 5ths there if we write a 5 6ths right over here, 5 6ths times 6 5ths, and we can take constants in and out of the integral like this, scaling constants, I should say. Well, now, so this is going to be equal to 5 6ths, this 5 6ths right over here. This antiderivative is pretty straightforward.