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4. Efectuaț îmărțirile: c) (32y²z⁵) : (–8y²z⁴); d) (–36xyz³) : (–9xz²); e) (–48a⁴b⁵c²) : (–6a²b²c²); f) (–15x⁶y³z⁴) : (–3x⁴y²z³).​