1) $$ -6a^4c^5\cdot5c^2a^6 = -6\cdot5\cdot a^{4+6}\cdot c^{5+2} = -30a^{10}c^7$$
Ответ: $$-30a^{10}c^7$$
2) $$(-6m^3n^2)^3 = (-6)^3\cdot(m^3)^3\cdot(n^2)^3 = -216m^{3\cdot3}n^{2\cdot3} = -216m^9n^6$$
Ответ: $$-216m^9n^6$$