Gruß radix !
$${\mathtt{\,-\,}}{\frac{{\mathtt{1}}{\mathtt{\,\times\,}}{\mathtt{x}}}{\left({\mathtt{1}}{\mathtt{\,\times\,}}{\mathtt{x}}\right)}} = -{\mathtt{1}}$$
$${\mathtt{\,-\,}}{\frac{{\mathtt{x}}}{{\mathtt{x}}}} = -{\mathtt{1}}$$ $${\frac{{\mathtt{0}}}{{\mathtt{x}}}} = {\mathtt{0}}$$
Mathematiker verwechseln oft Halloween und Weihnachten, weil Oct 31 = Dec 25 ist .