1.

∣∣∣∣∣1+a2−b22ab−2b2ab1−a2+b22a2b−2a1−a2−b2∣∣∣∣∣=

Answer» ∣∣
∣
∣
∣
1+a2−b22ab−2b2ab1−a2+b22a2b−2a1−a2−b2∣∣
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∣
∣
=



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