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Question
The simplified value of $$\left( {1 - \frac{{2xy}}{{{x^2} + {y^2}}}} \right)$$   $$ ÷ $$ $$\left( {\frac{{{x^3} - {y^3}}}{{x - y}} - 3xy} \right)$$    is?
Options:
A .  $$\frac{1}{{{x^2} - {y^2}}}$$
B .  $$\frac{1}{{{x^2} + {y^2}}}$$
C .  $$\frac{1}{{x - y}}$$
D .  $$\frac{1}{{x + y}}$$
Answer: Option B

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