I feel the same. ;(;8./#I) is cringey. Also, it goes against #5 in BANA's Provisional Guidance on Transcribing Mathematics in UEB, which says in part:
Unless a math expression can be correctly represented with only a grade 1 symbol indicator in the first three cells or before a single letter standing alone anywhere in the expression, begin the expression with a grade 1 word indicator (or a passage indicator if the expression includes spaces).
I'm passing your question along to the members of NBA's UEB Technical Material Committee for their astute input so we can give you specific feedback.