a) $$3^4 = 3 \cdot 3 \cdot 3 \cdot 3 = 81$$
б) $$2^5 = 2 \cdot 2 \cdot 2 \cdot 2 \cdot 2 = 32$$
в) $$(-1.2)^2 = (-1.2) \cdot (-1.2) = 1.44$$
г) $$\left(\frac{2}{3}\right)^3 = \frac{2}{3} \cdot \frac{2}{3} \cdot \frac{2}{3} = \frac{8}{27}$$
д) $$ \left(-1 \frac{1}{2}\right)^4 = \left(-\frac{3}{2}\right)^4 = \frac{81}{16} = 5 \frac{1}{16}$$
е) $$ \left(-3 \frac{1}{4}\right)^2 = \left(-\frac{13}{4}\right)^2 = \frac{169}{16} = 10 \frac{9}{16}$$