\"\"

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The expression is \"\".

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\"\"                          (Substitute \"\")

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To simplify the expression follow the order of operations: (PEMDAS)

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1.     Evaluate the expressions inside Brackets/Parenthesis (P).

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2.     Evaluate Powers/Exponents (E).

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3.     Multiply and/or Divide in order from left to right (MD).

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4.     Add and/or Subtract in order from left to right (AS).

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A simple technique for remembering the order pf operations is turned into phrase

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“Please Excuse My Dear Aunty Sally”

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\"\"

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First operation is Evaluate power.

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\"\"                            (Evaluate power: \"\")

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Next operation is multiplication.

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

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Next operation is division.

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\"\"                                           (Divide: \"\")

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Next operation is addition.

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\"\"                                              (Add: 9 + 12 = 21)

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Next operation is division.

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\"\"                                            (Divide: \"\")\"\"

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The value of the expression is 131.25.