I'm seeking a word or phrase useful for referring to a bad sentence which clumsily, inaccurately and ambiguously attempts to express an idea or concept.
Bad-sentence example: "We do a multiplication of 60 of the 10^10 terms to get us to 10^600 and then a multiplication of 10^3 terms to reach 10^603."
Phrases incorporating 'mangled', 'tortured ', 'muddled' and 'still-born' may resemble what I want, but seem overly judgmental.
Update (Response to questions about example; with 'infelicity' and 'solecism' adopted from an answer)
Inaccurate -- The sentence (from a sci.math newsgroup posting by "AP") is inaccurate or misleading in first using the "multiplication of ..." infelicity one way for the (10^10)^60 calculation, and then a different way for the (10^600)*(10^3) calculation. That is, if the first case means (10^10)^60, the second might be thought to mean either (10^10)^(10^3) or (10^600)^(10^3).
Clumsy -- The solecisms "a multiplication of 60 of the 10^10 terms to get us to 10^600" and "a multiplication of 10^3 terms to reach 10^603" are longwinded and ambiguous ways to say "compute 10^600 as the 60th power of 10^10" and "compute 10^603 as (10^600)*(10^3)".