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3. Expand the given factor using the identity

{(- 7 x + 8 y + 7 z)}^{2}

\(=\) ___________

$49 x^{2} + 64 y^{2} + 49 z^{2} - 112 x y + 112 y z - 98 x z$
$- 49 x^{2} + 64 y^{2} + 49 z^{2} + 112 x y + 112 y z - 98 x z$
$49 x^{2} + 64 y^{2} + 49 z^{2} + 112 x y + 112 y z + 98 x z$
$- 49 x^{2} + 64 y^{2} + 49 z^{2} - 112 x y + 112 y z - 98 x z$

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