Question 1

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Calcula     begin mathsize 12px style bold left parenthesis begin bold style 7 end style bold space bold x to the power of begin bold style 4 end style end exponent bold space bold plus bold space begin bold style 2 end style bold space bold x to the power of begin bold style 2 end style end exponent bold right parenthesis bold left parenthesis begin bold style 7 end style bold space bold x to the power of begin bold style 4 end style bold space end exponent bold minus bold space begin bold style 2 end style bold space bold x to the power of begin bold style 2 end style end exponent bold right parenthesis end style

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