👉 Underverse is a mathematical operation that reverses the order of an operand in a given expression. It's similar to flipping a coin, where you take the top card and flip it over so you get a new card. In this context, "underverse" refers to reversing the process of taking the top card from the deck or flipping a coin. For example, if you have a deck of cards with 52 cards in total (where each card represents a different number), you might perform
