One of the most advanced redstone builds out there is a calculator. Usually, only a pro could build one. The redstone would be nearly infinite, and it would be laggy. But today, I have come up with a way to make a calculator wihtout using redstone dust, repeaters, torches, pistons, blocks of redstone, comparators, etc. You can add and subtract. You can also go into negatives. You can keep on pressing the buttons, and it will keep adding/subtracting. (Note: If you press a button on the subtraction side first, the number will be negative) Your gamemode is set to creative, and you are encouraged to break out and look at the exterior, as proof to there is no redstone. I hope people will enjoy this and maybe even start a trend for no redstone.
Thanks!
~minecraft_guy228