$\"\"$

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The expression is $\"\"$ .

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Horizontal method:

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Rewrite as the difference of two products.

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$\"\"$

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Apply distributive property: $\"\"$ .

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$\"\"$

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$\"\"$

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Combine like terms.

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$\"\"$ $\"\"$

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Rewrite as the sum of two products.

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$\"\"$

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Apply distributive property: $\"\"$ .

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$\"\"$

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$\"\"$

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Group like terms.

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$\"\"$

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Combine like terms.

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$\"\"$

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$\"\"$

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The value of expression is $\"\"$ .