Where are you stuck? What have you tried?
What does a direct substitution produce?
I'm sure I'm making some mistakes, but following a professor who confuses himself and has to re-do solutions cause he makes mistakes on a regular basis makes it tough to pick up on the trickier application of stuff :P but here's what I tried. I'm pretty sure the e is what's making me do this incorrectly.
(8+1.00)/(12+2-1+0.14)= 9.00/13.14 which was incorrect.
I then tried to move the e^(-x) to the numerator to make the power positive but just like I figured that was wrong too. Just not exactly sure where my mistakes are :/