$\left(x^3+1\right)\left(x^2-2\right)$\left(x^3+1\right)\left(x^2-2\right)

$\left(x^3-1\right)\left(x^3+2\right)$\left(x^3-1\right)\left(x^3+2\right)

$\left(x^2+2\right)\left(x^4-1\right)$\left(x^2+2\right)\left(x^4-1\right)

$\left(x^4-2\right)\left(x+1\right)$\left(x^4-2\right)\left(x+1\right)