$\"\"$

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The expression is $\"\"$ .

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$\"\"$ (Substitute $\"\"$ for z and 14 for y)

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Subtract second number from the first number.

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To subtract an integer , add its opposite.

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Opposite of $\"\"$ is $\"\"$ .

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$\"\"$ (Add $\"\"$ to $\"\"$ )

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

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To subtract an integer , add its opposite.

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Opposite of $\"\"$ is $\"\"$ .

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$\"\"$ (Add $\"\"$ to $\"\"$ )

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

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