363,364 Заранее огромное спасибо

363.
$( \frac{ {x}^{3} + 216}{x - 6} ) \times ( \frac{ {x}^{2} - 12x + 36}{ {x}^{2} - 6x + 36} ) = \frac{(x + 6)( {x}^{2} - 6x + 36)}{x - 6} \times \frac{ {(x - 6)}^{2} }{ {x}^{2} - 6x + 36 } = (x + 6)(x - 6) = {x}^{2} - 36$
364.
$( \frac{ {x}^{3} - 343 }{x + 7} ) \times ( \frac{ {x}^{2} + 14x + 49}{ {x}^{2} + 7x + 49 } ) = \frac{(x - 7)( {x}^{2} + 7x + 49) }{x + 7} \times \frac{ {(x + 7)}^{2} }{ {x}^{2} + 7x + 49 } = (x - 7)(x + 7) = {x}^{2} - 49$