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Example 117
$\;\;\;(1 + 2a^{6}b^{4})(1 - 2a^{6}b^{4})$
$=(A + B)( A - B) \text{ , where } A = 1 \text{ and } B = 2a^{6}b^{4} $
$=A^2-B^2$
$=(1)^2 - (2a^{6}b^{4})^2 $
$=1 - 4a^{12}b^{8} $
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