1) -12a⁴bc²d ⋅ 5a³d⁴ ⋅ (-3b³cd²);

1) $$-12a^4bc^2d \cdot 5a^3d^4 \cdot (-3b^3cd^2) = -12 \cdot 5 \cdot (-3) \cdot a^4 \cdot a^3 \cdot b \cdot b^3 \cdot c^2 \cdot c \cdot d \cdot d^4 \cdot d^2 = 180a^7b^4c^3d^7$$

Ответ: $$180a^7b^4c^3d^7$$