Converting Messy Wolfram Code to Readable LaTeX: TemplateBox Troubles

Question

I had a simple LaTeX expression written in the Wolfram Cloud, namely $a_0 = $. I used ctrl+4 to display a box where I could write LaTeX. However, after some issue, it turned my simple expression into this mess:

Print[""!\*TemplateBox[<|\"boxes\" -> FormBox[RowBox[{SubscriptBox[StyleBox[\"a\", \"TI\"], \"0\"], \"\[LongEqual]\"}], TraditionalForm], \"errors\" -> {}, \"input\" -> \"a_0=\", \"state\" -> \"Boxes\"|>,\"TeXAssistantTemplate\"]""]

How can I revert it back to its original state without having to rewrite the entire code from scratch? Note that the expression $a_0=$ is just an example; we are talking about entire paragraphs that need correction. Therefore, I would like an automated way to convert the aforementioned mess back to a normal form.

Thanks in advance!

Answer 1

(* Given string *)
str = "\"!\*TemplateBox[<|\"boxes\" -> FormBox[RowBox[{SubscriptBox[StyleBox[\"a\", \"TI\"], \"0\"], \"\[LongEqual]\"}], TraditionalForm], \"errors\" -> {}, \"input\" -> \"a_0=\", \"state\" -> \"Boxes\"|>,\"TeXAssistantTemplate\"]\"";

(* Convert the string to an expression *)
expr = ToExpression[str, StandardForm, HoldForm];

(* Print the expression *)
Print[expr];