$$2 { \left( { x }^{ 5 } - { x }^{ 2 } -1 \right) }^{ 4 }$$
$2x^{20}-8x^{17}-8x^{15}+12x^{14}+24x^{12}-8x^{11}+12x^{10}-24x^{9}+2x^{8}-24x^{7}+8x^{6}-8x^{5}+12x^{4}+8x^{2}+2$
$2\left(x^{5}-x^{2}-1\right)^{4}$
