Ascii and subscript/superscript (Question Set)

hello, a colleague wants to use the "question set" (multiple choise, fill in the blanks, mark the words, true/false question). she has to use physical formulas and greek letters, but h5p does not accept Ascii. she writes the letters in word and uses copy/paste to transfer them in H5P. is there an eaysier way? she has also problems with subscript and superscript. it seems, that you cannot use this in H5P?

  
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