Example 100

$\;\;\;(8p^{7} + q^{5})(8p^{7} - q^{5})$

$=(A + B)( A - B) \text{ , where } A = 8p^{7} \text{ and } B = q^{5} $

$=A^2-B^2$

$=(8p^{7})^2 - (q^{5})^2 $

$=64p^{14} - q^{10} $