Applicare la formula: $a+\frac{b}{c}$$=\frac{b+ac}{c}$, dove $a=-2$, $b=4$, $c=\left(\frac{5}{\frac{8}{15^3}}\right)^4$, $a+b/c=\frac{4}{\left(\frac{5}{\frac{8}{15^3}}\right)^4}-2$ e $b/c=\frac{4}{\left(\frac{5}{\frac{8}{15^3}}\right)^4}$

Applicare la formula: $a^b$$=a^b$, dove $a=15$, $b=3$ e $a^b=15^3$

Applicare la formula: $\frac{a}{\frac{b}{c}}$$=\frac{ac}{b}$, dove $a=5$, $b=8$, $c=15^3$, $a/b/c=\frac{5}{\frac{8}{15^3}}$ e $b/c=\frac{8}{15^3}$