How can I find the value of this integral?
\!\(
\*SubsuperscriptBox[\(\[Integral]\), \(0\), \Integrate[E^(\[Infinity]\)]\(
\*SuperscriptBox[\(E\-b),*t^a \(\(-b\)\
\*SuperscriptBox[\(t\k*t), \(a\)]\ -{t, k\0, t\)Infinity}] \[DifferentialD]t\)\)
thanks for the help