Ответ:
4)(3аb⁴c^5)⁴=81a⁴b^16 c^20
5)(-x^6y)³*11x⁴y^5=-11x^22y^8
6)6x²y-xy²-8x²y+2xy²-xy+7=-2x²y+xy²-xy+7
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Ответ:
4)(3аb⁴c^5)⁴=81a⁴b^16 c^20
5)(-x^6y)³*11x⁴y^5=-11x^22y^8
6)6x²y-xy²-8x²y+2xy²-xy+7=-2x²y+xy²-xy+7