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http://functions.wolfram.com/06.35.21.0070.01
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Integrate[z^3 ExpIntegralEi[a z] ExpIntegralEi[(-a) z], z] ==
(1/(4 a^4)) (((6 + 6 a z + 3 a^2 z^2 + a^3 z^3) ExpIntegralEi[a z] -
E^(a z) ExpIntegralEi[(-a) z]
(E^(a z) (-6 + 6 a z - 3 a^2 z^2 + a^3 z^3) -
a^4 z^4 ExpIntegralEi[a z]) - 3 E^(a z) (a^2 z^2 + 4 Log[z]))/E^(a z))
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Date Added to functions.wolfram.com (modification date)
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