When I try to do an integration for this function I don't get a solution, why is it can't be integrated? It should be solvable
C2 = -(((1/2)*Subsuperscript[\[Epsilon], c, 11]^2 - a*Subsuperscript[\[Epsilon], c, 11] - k)/
((1/2)*a*Subsuperscript[\[Epsilon], c, 11] - 1)) /. Subsuperscript[\[Epsilon], c, 11] -> (1/2)*((r/\[Rho])^C - 1);
Integrate[-Exp[-C2], r]
