Factorize: $x^2-1-2a-a^2$.

The factors of $x^3-x^{2}y-x{y}^2+y^3$, are

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The factors of $x^3-1+y^3+3xy$, are

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The factors of $8a^3+b^3-6ab+1$are

${\left(x+y\right)}^3-{\left(x-y\right)}^3$ can be factorized as

The expression ${\left(a-b\right)}^3+{\left(b-c\right)}^3+{\left(c-a\right)}^3$ can be factorized as

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The value of $\frac{{\left(2.3\right)}^3-0.027}{{\left(2.3\right)}^2+0.69+0.09}$, is

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The value of $\frac{{\left(0.013\right)}^3+{\left(0.007\right)}^3}{{\left(0.013\right)}^2-0.013\times 0.007+{\left(0.007\right)}^2}$, is

The factors of $a^2-1-2x-x^2$, are