Problem with converting \frac into mathematica output

Question

Please help me with the following problem:

TeXForm[2/3]

The Answer is correct:

"\frac{2}{3}"

I don't understand why Mathematica gives me a wrong inverse:

ToExpression["\frac{2}{3}", TeXForm]

The Answer is:

23 a c r

Answer 1

You should escape "\" by second "\"

ToExpression["\\frac{2}{3}", TeXForm]

To avoid this problem, produce strings explicitly. Copy-pasted text from the TeXForm is designed for an external TeX editor

ToString[2/3, TeXForm]
(* "\\frac{2}{3}" *)