\"\"

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The expression is \"\"

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\"\"             (Substitute: \"\")

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\"\"

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Apply the order of operations (PEDMAS).

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First operation is evaluating expression inside the brackets.

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

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

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

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Next operation is addition.

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= 10.5                                                (Add: \"\")

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\"\"

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The value of the expression is 10.5.