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Example 118
$\;\;\;(v + 2u^{10})(v - 2u^{10})$
$=(A + B)( A - B) \text{ , where } A = v \text{ and } B = 2u^{10} $
$=A^2-B^2$
$=(v)^2 - (2u^{10})^2 $
$=v^{2} - 4u^{20} $
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