How do I fix this? i have to hand this assignment in by tuesday x_x. so far maple11 isn't giving me a decimal answer because it thinks e is also a variable. I was also having trouble trying to make composite functions but i found a little way around it so it isn't that much of a deal for me, however if you can point out my mistake to me and what i should have done instead, i will greatly appreciate it.

here's an image of my question+what i've done so far.