User:Bbhattacharya

Simplify$\frac{x^2+y^2}{x^2y^2}+\frac{y^2+z^2}{y^2z^2}+\frac{z^2+x^2}{z^2x^2}+\frac{(xy+z^2)^2-xy(xy+2z^2)}{(xyz)^2}+\frac{(yz+x^2)^2-yz(yz+2x^2)}{(xyz)^2}+\frac{(zx+y^2)^2-zx(zx+2y^2)}{(xyz)^2}}$ (Error compiling LaTeX. Unknown error_msg).