Error when I want to convert a math problem to an expression

[musiolmarco]

Hello and thank you first of all that you have put so much effort into the package and make it available to us.

Actually everything works very well, I only have a single problem. To help you understand the problem, maybe I should briefly describe my situation: I am currently working on a math app and get a LaTeX string result, which I would like to edit with your package. So as soon as a MathField is created, I want to give it a MathFieldEditingController and change the value with mathFieldEditingController.updateValue('...'); with my LaTeX value when initializing the class. This all works very well, if I take the examples from your or the math_expressions package.

But if I want to take the LaTeX string from me and convert it to an expression I always get an error. I tried it with the TeXParser('...').parse();, as well as the Expression expression = parser.parse('...'); method. I also tried several times to transform the string somehow so that the expression can be created, however it did not work.

Of course it could be that I don't understand the method somehow, but can someone help me and tell me how to put the LaTeX string from me into your MathField?

Here you also have a few examples with the values and the exceptions that occurred, so that you understand even better what exactly I mean:

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