Unfortunately between the "]" and the "tg-1" you have a series of 14 unicode characters that fall into the "private use" range, meaning that any particular printable representation assigned to them is for use only within one program. U+F0BD U+F0D7 U+F0E9 U+F0D7 and so on. We do not know if those are important for our understanding ?
When you say "inverse tg" is that "inverse tan" ?
