0=-2 - 90^90 (1 + i t ) (90+ i t )^(-90) + t ^2 + i 90^(-90) (90 + i t )^90 (i + t )0=-2 - 90^90 (1 + i t ) (90+ i t )^(-90) + t ^2 + i 90^(-90) (90 + i t )^90 (i + t )

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