I did not flip any signs, merely reversed the order in which the operations are written out. If you read the right side from right to left, it has the same meaning as the left side from left to right.
Hell, the convention that the sign is on the left is also just a convention, as is the idea that the smallest digit is on the right (which should be a familiar issue to programmers, if you look up big endian vs little endian)









I’ve got one light in a room that makes a quiet whining noise when on, seemingly only after a minute or so (maybe after it warms up a bit). Thankfully I can just keep it off just fine, but occasionally I’ll turn it on for a bit more brightness, and realise it’s still on a while later by the annoying noise.