$\"\"$

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The expression is $\"\"$ .

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Rewrite the expression $\"\"$ .

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Rewrite multiply by the reciprocal.

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$\"\"$

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$\"\"$

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$\"\"$ divide into factors $\"\"$ .

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$\"\"$ divide into factors $\"\"$ .

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$\"\"$

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$\"\"$

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Take out common factors.

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$\"\"$

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Multiply numerators and denominators.

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$\"\"$

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$\"\"$

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$\"\"$

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The difference of $\"\"$ .