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Ответ:

x(2-y)+3(2-y)=(x+3)(2-y)

2(x²+1)-x³(1+x²)=(x²+1)(2-x³)

3a(4a+3c)-2b(3c-4a)=(3a-2b)(4a+3c)

a(b-c)+y(b-c)=(a+y)(b-c)

3(x-y)-b(x-y)=(3-b)(x-y)