Applicare la formula: $\left(ab\right)^n$$=a^nb^n$

Applicare la formula: $a^b$$=a^b$, dove $a=\frac{2}{5}$, $b=2$ e $a^b=\left(\frac{2}{5}\right)^2$

Applicare la formula: $\frac{a}{b}c$$=\frac{ca}{b}$, dove $a=4$, $b=25$, $c=-25$, $a/b=\frac{4}{25}$ e $ca/b=-25\cdot \left(\frac{4}{25}\right)\sin\left(x\right)^2$

Applicare la formula: $ab$$=ab$, dove $ab=-25\cdot 4$, $a=-25$ e $b=4$

Applicare la formula: $\frac{a}{b}$$=\frac{a}{b}$, dove $a=-100$, $b=25$ e $a/b=-\frac{100}{25}$