Answer:
Numerator 2b^2 + 2a^2
Denominator (b-a)(b+a)^2
2b / (b+a)^2 + 2a / (b-a)(b+a)
2b (b-a) + 2a (b + a) / (b-a) * (b+a)^2
2b^2 - 2ab + 2ab + 2a^2 / (b-a)(b+a)^2
2b^2 + 2a^2 / (b-a) * (b+a)^2
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