a) $$5^4 - 4^3 = 625 - 64 = 561$$
б) $$(-6)^3 + (-1)^{10} = -216 + 1 = -215$$
в) $$9 \cdot (\frac{2}{9})^3 = 9 \cdot \frac{2^3}{9^3} = 9 \cdot \frac{8}{729} = \frac{9 \cdot 8}{729} = \frac{72}{729} = \frac{8}{81}$$
Ответ:
a) 561
б) -215
в) $$\frac{8}{81}$$