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

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The expression is $\"\"$ . $\"\"$ (Evaluate powers: $\"\"$ ) \ \

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$\"\"$ (Multiply: $\"\"$ ) \ \

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$\"\"$ (Add: $\"\"$ ) \ \

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$\"\"$ (Multiply: $\"\"$ ) \ \

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$\"\"$ (Divide: $\"\"$ ) $\"\"$ (Divide: $\"\"$ ) \ \ $\"\"$ (Subtract: $\"\"$ ) $\"\"$

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According to subtraction property of equality: if $\"\"$ , then $\"\"$ .

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$\"\"$ (Subtract r from each side)

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$\"\"$ (Commutative property: a + b = b + a)

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$\"\"$ (Additive inverse property: $\"\"$ ) \ \

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$\"\"$ (Subtract: $\"\"$ )

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$\"\"$ (Additive identity property: $\"\"$ ) \ \ $\"\"$

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According to division property of equality: if $\"\"$ , then $\"\"$ .

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$\"\"$ (Divide each side by 2)

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$\"\"$ (Cancel common terms) $\"\"$

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