1)(а\2+15а+14)-(а\2+15а-14)=... 2)9а\2в (7а\2-5ав-4в\2)=...
3)(5а-2в)*(3а+4в)=...
4)(4а\3в\2-12а\2в\2в\3):(2ав)
ПОЖАЛУЙСТА ПОМОГИТЕ ПРОШУУУУУУУУУУ!!!! БУДУ БЛОГОДАРГА.
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