Respuesta :

[tex] \frac{(x+1)(x-1)}{(x+1)(x-1)(x+1)} - \frac{2(x-1)}{(x+1)(x-1)(x+1)} + \frac{3(x+1)}{(x+1)(x-1)(x+1)} [/tex]

=[tex] \frac{x^2-2-2x+2+3x+3}{(x+1)(x-1)(x+1)} [/tex]
= [tex] \frac{x^2+x+4}{(x+1)(x-1)(x+1)} [/tex] is what I got.