б) (1/3a²)³; б) (8a²b)²; б) (-10a³b²)⁴; б) -(-4x³c)³;

б) $$\left(\frac{1}{3}a^2\right)^3 = \left(\frac{1}{3}\right)^3 \cdot (a^2)^3 = \frac{1}{27}a^6$$

б) $$(8a^2b)^2 = 8^2 \cdot (a^2)^2 \cdot b^2 = 64a^4b^2$$

б) $$(-10a^3b^2)^4 = (-10)^4 \cdot (a^3)^4 \cdot (b^2)^4 = 10000a^{12}b^8$$

б) $$-(-4x^3c)^3 = -((-4)^3 \cdot (x^3)^3 \cdot c^3) = -(-64x^9c^3) = 64x^9c^3$$

Ответ: б) $$\frac{1}{27}a^6$$, б) $$64a^4b^2$$, б) $$10000a^{12}b^8$$, б) $$64x^9c^3$$