Calculation: (1) x + 2Y + (4Y ^ 2 / x-2y) (2) (x / x ^ 2-1) divided by (x ^ 2 + 4x + 3) / (x ^ 2 + 2x + 1) (3) 12 / (m ^ 2-9) plus 2 / (3-m) X + 2Y + 4Y ^ 2 / (x-2y)

(1) (x + 2Y) + 4Y & sup2; / (x-2y) = [(x + 2Y) (x-2y) + 4Y & sup2;] / (x-2y) = x & sup2; / (x-2y) (2): (X & sup2; + 4x + 3) / (X & sup2; + 2X + 1) = [(x + 1) (x + 3)] / (x + 1) & sup2; = (x + 3) / (x + 1), so the original formula = x / (X & sup2; - 1) / [(x + 3) / (x + 1)] (I think you should be

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