\"\"

\

Original function is \"\".

\

Replace x = 7 in original function.

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\"\"

\

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

\

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

\

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

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

\

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

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\"\"

\

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

\

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

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

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\"\", and \"\".