@Kitonum thank you so much! This is exactly what I needed!

@Markiyan Hirnyk  I might just be stressed and not see it. Sorry to bother you then. I'll see if I can figure it out. Thank you for trying to help.

@Markiyan Hirnyk 

I really doubt the teacher knows how to do it, but he won't accept it unless it's in this form... He told me to collect(E_T, numerals) but that doesn't help me...

@Carl Love Thank you so much! perfect!

@Preben Alsholm 

How can I now rearrange whats inside of the sqrt to the form of 1/r+1/mu?

@Markiyan Hirnyk 

Sorry, might not been clear. I want the rest to stay the same, only extract exp and numbers. Thank you for helping! Really appreciate it!