Номер 2.
1) 5y(3x-5y)
2)
3) 3xy(3x-4y+5xy)
4) (a-y)(3+b)
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Номер 2.
1) 5y(3x-5y)
2)![4a^{4}(3a-1) 4a^{4}(3a-1)](https://tex.z-dn.net/?f=4a%5E%7B4%7D%283a-1%29)
3) 3xy(3x-4y+5xy)
4) (a-y)(3+b)