125a6b3 * (-0,2a2b4)3 = 125a6b3 * (-0,2)3 * (a2)3 * (b4)3 = 125a6b3 * (-0,008) * a6 * b12 = (125 * (-0,008)) * (a6 * a6) * (b3 * b12) = -1 * a6+6 * b3+12 = -a12b15
Ответ: -a¹²b¹⁵