What countries do they come from and what are Rankine, Delisle, Reaumur and Romer? I know of the rest... they are used in chemistry...
Math Is Fun Rocks!
By the power of the exponent, I square and cube you!
In mathematics, you don't understand things. You just get used to them.
Of course that result can be rigorously obtained, but who cares?
Combinatorics is Algebra and Algebra is Combinatorics.