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
3+(y−19)2(z−12)2x−11+(x−11)2(z−12)2y−19+(x−11)2(y−19)2z−12−14(x−11)(y−19)(z−12)x+y+z is equal to :
