Applicare la formula: $x^mx^n$$=x^{\left(m+n\right)}$, dove $x=a$, $m=2$ e $n=-4$

Applicare la formula: $x^mx^n$$=x^{\left(m+n\right)}$, dove $x=b$, $m=\frac{23}{10}$ e $n=-3$

Applicare la formula: $x^a$$=\frac{1}{x^{\left|a\right|}}$

Applicare la formula: $\frac{a}{b}\frac{c}{f}$$=\frac{ac}{bf}$, dove $a=4$, $b=a^{2}$, $c=1$, $a/b=\frac{4}{a^{2}}$, $f=b^{0.7}$, $c/f=\frac{1}{b^{0.7}}$ e $a/bc/f=\frac{4}{a^{2}}\frac{1}{b^{0.7}}$