Question

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Answer 1

$frac{ {a}^{2}( {a}^{2} + 2) }{ {(a - 1)}^{2} } + frac{ { a }^{2}(1 - {a}^{2}) }{ {(1 - a)}^{2} } = frac{ {a}^{2}( {a}^{2} + 2) + {a}^{2} ( 1 - {a}^{2}) }{ {(a - 1)}^{2} } = frac{ {a}^{4} + 2 {a}^{2} + {a}^{2} - {a}^{4} }{ {(a - 1)}^{2} } = frac{3 {a}^{2} }{ {(a - 1)}^{2} }$

Answer 2

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