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• 68 What exactly is Laplace transform?
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• 8 How to evaluate $ \int_0^\infty {1 \over x^x}dx$ in terms of summation of series?
• 6 How to show that linear map is invertible?
• 6 Integrate: $\int \frac{dx}{x \sqrt{(x+a) ^2- b^2}}$
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