Originally Posted by
jiboom if only you could write this as the integral of e^x[something involving e^x and e^(-x)]
or,if you have to do it by parts, just use parts twice. If we call the integral I., when you do parts twice you will end up with
I=something+kI whrer something and k are found from doing parts
which we can arrange as
(1-k)I=something
and so I can be found.