I would write it 42 base-ten = 0101010 base-two, with that centered 1.
Yes, math = 42 with a = 1, etc, to z = 26; but math = 66 with z = 1, etc, to a = 26. In this scheme of things, physics = 99, and 90, respectively.
So, with math, we have 42 = 3*14 = (4 - 1)*14 ---> 4114; with physics, 90 = 45*2 = (4*11 + 1)*sqrt(4) ---> 41114. And, with the counts going the other ways, with math, we have 66 = 6*11 ---> 611; with physics, 99 = 9*11 ---> 911. Incidentally, with your straight-up count, mathematics = 112 = 114 - 2 = 114 - (1 + 1) ---> 11411.