Order of Operations:

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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 of operations is turned into phrase

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“Please Excuse My Dear Aunty Sally”  \"\"

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The expression is \"\".

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\"\"                 (Substitute r = 5)

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First operation is evaluating 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 addition.

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

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Next operation is subtraction.    

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

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The value of the expression is 126.