Do you get the answer?
The correct answer is to move “2” in “102” up, and the equation will become 101-10^2=1.
Amazing right? The reason I gave Mark 2:1-12 as clue is because this story is about a paralyzed man was lowered to Jesus by his friends from the roof above. One point I received from this story is when we cannot find ways in this horizontal world, we can take a different path and find vertical ways. After all, we have a heavenly father above.
Hope you get grace from this little game.