Double exponential integration (-∞,∞)

Calculates the integral of the given function f(x) over the infinite interval (-∞,∞) using the Double exponential formula.

This method is suitable for the function with algebraic decay at infinity.
The integrand f(x) is assumed to be analytic and non-periodic except for the endpoint.
 Double exponential integration (-∞,∞)

f(x)
 

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