HCF and LCM

Hi my good friends,

me again....

Factoring the following 3 equations:

1). \(3x^2-x-14\)

   \((3x-7)(x+2)\)

2). \(3x^2-13x+14\)

    \((3x-7)(x-2)\)

3). \(x^2-4\)

     \((x-2)(x+2)\)

LCM = \((3x-7)(x+2)(x-2)\) Which can be written \((3x-7)(x^2-4)\)

HCF however is not present?..Am I making a mistake here?

Thank you all kindly...