another fan, @horejsiii, added. Other fans also joked about the video's clue, saying the singer is now in his Quantum Physics era, leaving the Simple Math symbols era behind. "Great first math now ...

Create a series of equations to produce each number from 0 to 20, using just '4 Fours' in each equation, along with basic math symbols. Don't forget the standard order of operations, as you'll need to ...