$$(12 { x }^{ 5 } +5 { x }^{ 4 } -14 { x }^{ 3 } -5x) \times (72 { x }^{ 6 } + { x }^{ 3 } -13x)$$
$x^{2}\left(12x^{4}+5x^{3}-14x^{2}-5\right)\left(72x^{5}+x^{2}-13\right)$
$864x^{11}+360x^{10}-1008x^{9}+12x^{8}-355x^{7}-170x^{6}-65x^{5}+177x^{4}+65x^{2}$
