Let $f(x,y,z) = \frac{(x^2+y)(y^2+x)}{(x+y-1)^2}+\frac{(y^2+z)(z^2+y)}{(y+z-1)^2}+\frac{(z^2+x)(x^2+z)}{(x+z-1)^2}-2(x+y+z)$. Then $f(x,y,z)$ is the...
You may need to add an empty pair of braces before the superscript, like this: {}^{A}B. Otherwise, the superscript will attach itself to the previous...