If \( (x,y,z) \) be an arbitrary point lying on a plane \( P \) which passes through the points \( (42,0,0) \), \( (0,42,0) \) and \( (0,0,42) \), then the value of the expression \(\displaystyle 3 + \frac{x-11}{(y-19)^{2}(z-12)^{2}} + \frac{y-19}{(x-11)^{2}(z-12)^{2}} + \frac{z-12}{(x-11)^{2}(y-19)^{2}} + \frac{x+y+z}{14(x-11)(y-19)(z-12)} \) is equal to:
