Ответ:(a8/b7)−2 = a−16b14 = b14/a16.(m−4/n−5)−3 = (n5/m4)−3 = m12/n15.(2x6/(3y−4))2 = (2x6y4/3)2 = 4x12y8/9.(−4x−5y/z3)3 = −64x−15y3/z9 = −64y3/(x15z9).