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The expression is \"\"

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\"\"                          (Replace n with 7)

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To simplify the expression following order of operations to performed:

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1.      Evaluate the expressions inside grouping symbols.

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2.      Evaluate powers.

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

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

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In the given expression there are no grouping symbols.

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First operation is multiplication.

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\"\"                              (Multiply \"\")

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Next operation is subtraction.         

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\"\"                                        (Subtract \"\")

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The value of the expression is \"\" .

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