Question

scrieți in forma cea mai simpla expresia
$( \frac{1}{x + 1} + \frac{1}{x - 3} \times \frac{9 - {x}^{2} }{ {x}^{2} - x + 1 } ) \div \frac{x + 2}{ {x}^{2} + 1 }$
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Answer 1

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