[tex] \frac{ab+ba}{xy+yx} = \frac{10 +b + 10b + a}{10x+y+10y+x} = \\
\frac{11a+11b}{11x+11y} [/tex]
Se simplifica cu 11
[tex] \frac{abc+bca+cab}{xyz+yzx+zxy}= \\
= \frac{100a+10b+c+100b+10c+a+100c+10a+b}{100x+10y+z+100y+10z+x+100z+10x+y}= \\
= \frac{111a+111b+111c}{111x+111y+111z} [/tex]
Se simplifica cu 111
