$\"\"$

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The expression is $\"\"$ .

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Rewrite the expression $\"\"$ .

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Apply product of a sum and difference formula: $\"\"$ .

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$\"\"$

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Evaluate powers: $\"\"$ .

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$\"\"$

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$\"\"$

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Distribute terms using distributive property: $\"\"$ .

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$\"\"$

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Distribute terms using distributive property: $\"\"$ .

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$\"\"$

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$\"\"$

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Product of two same sings is positive.

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$\"\"$

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$\"\"$

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Combine like terms using distributive property: $\"\"$ .

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$\"\"$

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$\"\"$

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Product of two different sings is negative.

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$\"\"$

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$\"\"$

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The simplified expression is $\"\"$ .