1) -6(1-ху)-2(3+2х)+12 = -6 + 6ху - 6 - 6х + 12 = 6ху - 6х
2) 3y(2x-1)-(xy-1)-5x(y+3)+6(x+y+1) = 6xy - 3y - xy + 1 - 5xy - 15x + 6x + 6y + 6 = -6xy + 6x - 15x + 6y - 3y + 1
3) 2a(3-b)-3b(f-1)-5(ab-a-b) = 6a - 2ab - 3bf + 3b - 5ab + 5a + 5b = -2ab - 3bf + a + 8b + 5
4) -4(x-y-2)+6(1-x+y)+2(5x-5y-2) = -4x + 4y + 8 + 6 - 6x + 6y + 10x - 10y - 4 = 10x - 7y + 2
5) 5(1-a+b)-3(2-a-b)+(1-a+2b) = 5 - 5a + 5b - 6 + 3a + 3b + 1 - a + 2b = -5a + 3a + a + 5b + 3b + 2b - 5 + 1 = -a + 10b - 4
1) -6(1-ху)-2(3+2х)+12 = -6 + 6ху - 6 - 6х + 12 = 6ху - 6х
2) 3y(2x-1)-(xy-1)-5x(y+3)+6(x+y+1) = 6xy - 3y - xy + 1 - 5xy - 15x + 6x + 6y + 6 = -6xy + 6x - 15x + 6y - 3y + 1
3) 2a(3-b)-3b(f-1)-5(ab-a-b) = 6a - 2ab - 3bf + 3b - 5ab + 5a + 5b = -2ab - 3bf + a + 8b + 5
4) -4(x-y-2)+6(1-x+y)+2(5x-5y-2) = -4x + 4y + 8 + 6 - 6x + 6y + 10x - 10y - 4 = 10x - 7y + 2
5) 5(1-a+b)-3(2-a-b)+(1-a+2b) = 5 - 5a + 5b - 6 + 3a + 3b + 1 - a + 2b = -5a + 3a + a + 5b + 3b + 2b - 5 + 1 = -a + 10b - 4