Ответ:
1) ay + xy + 2a + 2x
2) a + y - 2a² - 2ay
3) 3b - 3y - bk + ky
4) 2a - 3b + 2ak - 3bk
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Ответ:
1) ay + xy + 2a + 2x
2) a + y - 2a² - 2ay
3) 3b - 3y - bk + ky
4) 2a - 3b + 2ak - 3bk