\"\"

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Original function is \"\"

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Replace x = 4 in original function.

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\"\"     

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\"\"                              (Evalute powers: \"\" )                      \ \

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

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

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

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\"\"

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Replace x = – 2 in original function.

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\"\"      

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\"\"        (Evalute powers: \"\" )              

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

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\"\"                                                    (Subtract: \"\"and Add :\"\")

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

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\"\"

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\"\" and \"\".

\