Applicare la formula: $x\cdot x^n$$=x^{\left(n+1\right)}$, dove $x^nx=\left(x^2-4x+13\right)^2\left(x^2-4x+13\right)$, $x=x^2-4x+13$, $x^n=\left(x^2-4x+13\right)^2$ e $n=2$

Applicare la formula: $\left(a+b+c\right)^3$$=a^3+3a^2b+3a^2c+b^3+3ab^2+3b^2c+c^3+3ac^2+3bc^2+6abc$, dove $a=x^2$, $b=-4x$ e $c=13$

Applicare la formula: $x\cdot x^n$$=x^{\left(n+1\right)}$, dove $x^nx=-12x^{4}x$, $x^n=x^{4}$ e $n=4$

Applicare la formula: $x\cdot x^n$$=x^{\left(n+1\right)}$, dove $x^nx=-312x^2x$, $x^n=x^2$ e $n=2$