Ответ:(−6)³m⁹n⁹ = −216m⁹n⁹.(−7)²x¹⁸y²⁰ = 49x¹⁸y²⁰.0,5²a²⁴b²⁸ = 0,25a²⁴b²⁸.3⁴a⁴b¹⁶c²⁰ = 81a⁴b¹⁶c²⁰.(−1/2)⁵x⁴⁰y⁴⁵ = −1/32 x⁴⁰y⁴⁵.2 1/7 = 15/7; (15/7)²a¹²b¹⁶ = 225/49 a¹²b¹⁶.