7. Сократите дробь (4ab⁵)/(a⁴b³).

(4ab⁵)/(a⁴b³) = 4 * (a/a⁴) * (b⁵/b³) = 4 * a^(1-4) * b^(5-3) = 4 * a^(-3) * b² = (4b²)/a³