2 weeks ago, I voted to close
Sum of terms in a reduced residue system as a duplicate. There were no more close votes of any sort when I checked several times, with my vote now gone (the timeline says the "close" was "invalidated", but with no names associated, so I'm almost certain it timed out with either no or insufficient reviews). As I have to wait about 16 days, I'd appreciate somebody voting to close this, such as with my suggested duplicate.