```
n=var('n')
su1=sum(1/(5*n)-1/(5*n+1),n,2,oo);su1
```
RuntimeError: Encountered operator mismatch in maxima-to-sr translation-- You received this message because you are subscribed to the Google Groups "sage-devel" group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-devel+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/sage-devel/CAGUWgD-OwxWZyhiF3OWBG%3Dm%3Dy0RHLjDGdSo1c3WwR8D%2Bk57OhA%40mail.gmail.com.
