I have already determined that this can be calculated with:

When I solve this I get 22.183

The second part of this question wants me to put this into the form of a SINGLE integral with just one upper and lower limit.

How do I do this?

I assume I just add the two integrals like so:

Is this correct? How do I get the upper and lower limits? I assume its not just -5 & 59 right?