Does anyone know what set(s) these belong to? I have been searching but have had no luck. Thank you.
The back part of this set is from set 7693 ETX Alien Strike from the Mars Mission theme from 2007. I found this by looking for sets that had at least 4 of the “Plate 1x2 with bar - free ends” in Orange, and then looked at all the matching sets to find the “flag” piece with the (in your case) badly placed sticker.
The front slope with the circled 4 is not from that set; in fact, I cannot find any such piece on BrickLink at all, so this might be from a clone set as were the other items you originally posted in your question but since removed. Does it have LEGO markings anywhere on the piece?