(sequences of syllables or letters), and so mathematical rules cannot possibly apply in a logical way.
mmmm.... careful, lol.
Calculus loves them some sequences of letters and shit.
It seems fair that if they're treating ROM as one word unit, as we all do. (seriously, if you say CD Are Oh Emm, you are a tool and should never open your face again)
So since it's one unit, squaring it works. It's really no different than any other substitution crap used in Calculus with exponents.
we have X^2, squiggly greek letters ^ 2, why not have ROM^2 too.
X^2 = XX, ROM^2 = ROMROM.
It all makes sense really.