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$$ 2\int_0^\infty \sum_{k=0}^2 \frac{(\frac{t}{6})^k}{k! e^{t/6}} \cdot\left(1-\frac{1}{e^{t/9}}\right)\cdot\frac{1}{e^{t/9}}\cdot\frac{1}{9} dt$$
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Sat, 24 Feb 2024 00:27 GMT