а) $$(-10ab^{12})^2 = (-10)^2 \cdot a^2 \cdot (b^{12})^2 = 100a^2b^{24}$$
б) $$(-0,2x^4y)^4 = (-0.2)^4 \cdot (x^4)^4 \cdot y^4 = 0.0016x^{16}y^4$$
в) $$(-3xy^2a^3)^3 = (-3)^3 \cdot x^3 \cdot (y^2)^3 \cdot (a^3)^3 = -27x^3y^6a^9$$
г) $$(-0,5ab^2c^3)^4 = (-0.5)^4 \cdot a^4 \cdot (b^2)^4 \cdot (c^3)^4 = 0.0625a^4b^8c^{12}$$
Ответ: а) $$100a^2b^{24}$$; б) $$0.0016x^{16}y^4$$; в) $$-27x^3y^6a^9$$; г) $$0.0625a^4b^8c^{12}$$.