1) 2a(x+y)+b(x+y) = 2ах + 2ау + bx + by
2) y(a-b)-(a-b) = ay - by - a + b
3) (c+3)-x(c+3) = c + 3 - cx - 3x
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1) 2a(x+y)+b(x+y) = 2ах + 2ау + bx + by
2) y(a-b)-(a-b) = ay - by - a + b
3) (c+3)-x(c+3) = c + 3 - cx - 3x