When an explicit integral cannot be found, and the bounds are numeric and there are no free variables other than the variable of integration, then MuPAD will do a numeric integration.
However, you have a number of free variables in your integrals, so numeric integration cannot be done.
When I test, I find that q_in is representable explicitly, but not new_in .
When an explicit integral cannot be found and a numeric integral cannot be done, an expression would still be returned: it would be an expression involving an unresolved integration.
