\"\"

\

Original function is \"\".

\

Replace x = 7 in original function.

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\"\"

\

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

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

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

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

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Replace x = \"\"3 in original function.

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\"\"

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\"\"         (Evaluate power: \"\")

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\"\"                 (Multiply: \"\")

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

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

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\"\", and \"\".