1)Reduza as expressões algébricas ao termo semelhante:

a)x(2 - a) + 2a - 3x+y(a + b)

b)2(y+2x)+3xy - 2a + 4y

c)3(x+y) - 2y(2-4)

d)3xy+2x - 3xy +6x​

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