Question 1175939
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Something is wrong in your post writing.



Probably,  you missed the  " = "  sign;    probably, something else. 



            (If the visitor missed at least one symbol in his post, nobody can be sure what else did he  (or she)  miss).



One can interpret your writing as identical transformation  (with the missed  " = "  sign).


If so,  then the inverse transformation is identical,  too.



But it is only my hypothesis . . .