Um... clicking through to each integration method, they clearly have examples and documentation on how they work: https://docs.rs/integrate/latest/integrate/ad

Um... clicking through to each integration method, they clearly have examples and documentation on how they work: https://docs.rs/integrate/latest/integrate/adaptive_quadrature/simpson/fn.adaptive_simpson_method.html https://docs.rs/integrate/latest/integrate/adaptive_quadratu... https://docs.rs/integrate/latest/integrate/gauss_quadrature/legendre/fn.legendre_rule.html https://docs.rs/integrate/latest/integrate/gauss_quadrature/... https://docs.rs/integrate/latest/integrate/romberg/fn.romberg_method.html https://docs.rs/integrate/latest/integrate/romberg/fn.romber...