Làm tính chia

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sài 3. Làm tính chia
a) [(x-y} +3(x-y)]:÷(x-y):
b) [5(x+2y)* -6(x +2y)]:2(x +2y)*;
) [S(a-b)' +2(a=b)]:(b-a);
d) [2(x-y+2) +3(y=x=-2)]:(y-x-2)';
-X-2
e) 5(x-2y):(5x-10y);
f) (x' +8y'):(x+2y).