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X 4 2t 3t. 4t+7t+23 122. 6t+4=7t+15. 8t + 2 - (5 + 7t) - 4t. 3t^2-4t-7.
4t+7t+23 122. 6t+4=7t+15. 8t + 2 - (5 + 7t) - 4t. 3t^2-4t-7.

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