Пошаговое объяснение:
1/3*3 * а^4 * b = 1a^4*b =
(-2)^4 * 5/7 = 16 * 5/7 = 80/7 = 11 3/7
4* 1/16 * a^3 * b^2 * c =
4/16 * 4^3 * (1/4)^2 * 3 =
1/4 * 64 * 1/16 * 3 =
16 * 1/16 * 3 =
1 * 3 = 3
