2 (-(Power(k,6)*(-35 + 16*Sqrt(1 + Power(k,2)/Power(c - Complex(0,1)*k0,2)))*(c - Complex(0,1)*k0) + 2*Power(k,4)*(-35 + 24*Sqrt(1 + Power(k,2)/Power(c - Complex(0,1)*k0,2)))*Power(c - Complex(0,1)*k0,3) + 8*Power(k,2)*(-7 + 6*Sqrt(1 + Power(k,2)/Power(c - Complex(0,1)*k0,2)))*Power(c - Complex(0,1)*k0,5) + 16*(-1 + Sqrt(1 + Power(k,2)/Power(c - Complex(0,1)*k0,2)))*Power(c - Complex(0,1)*k0,7))/(336.*Power(k,4)) + (Power(k,6)*(-35 + 16*Sqrt(1 + Power(k,2)/Power(2*c - Complex(0,1)*k0,2)))*(2*c - Complex(0,1)*k0) + 2*Power(k,4)*(-35 + 24*Sqrt(1 + Power(k,2)/Power(2*c - Complex(0,1)*k0,2)))*Power(2*c - Complex(0,1)*k0,3) + 8*Power(k,2)*(-7 + 6*Sqrt(1 + Power(k,2)/Power(2*c - Complex(0,1)*k0,2)))*Power(2*c - Complex(0,1)*k0,5) + 16*(-1 + Sqrt(1 + Power(k,2)/Power(2*c - Complex(0,1)*k0,2)))*Power(2*c - Complex(0,1)*k0,7))/(168.*Power(k,4)) - (Power(k,6)*(-35 + 16*Sqrt(1 + Power(k,2)/Power(3*c - Complex(0,1)*k0,2)))*(3*c - Complex(0,1)*k0) + 2*Power(k,4)*(-35 + 24*Sqrt(1 + Power(k,2)/Power(3*c - Complex(0,1)*k0,2)))*Power(3*c - Complex(0,1)*k0,3) + 8*Power(k,2)*(-7 + 6*Sqrt(1 + Power(k,2)/Power(3*c - Complex(0,1)*k0,2)))*Power(3*c - Complex(0,1)*k0,5) + 16*(-1 + Sqrt(1 + Power(k,2)/Power(3*c - Complex(0,1)*k0,2)))*Power(3*c - Complex(0,1)*k0,7))/(168.*Power(k,4)) + (Power(k,6)*(-35 + 16*Sqrt(1 + Power(k,2)/Power(4*c - Complex(0,1)*k0,2)))*(4*c - Complex(0,1)*k0) + 2*Power(k,4)*(-35 + 24*Sqrt(1 + Power(k,2)/Power(4*c - Complex(0,1)*k0,2)))*Power(4*c - Complex(0,1)*k0,3) + 8*Power(k,2)*(-7 + 6*Sqrt(1 + Power(k,2)/Power(4*c - Complex(0,1)*k0,2)))*Power(4*c - Complex(0,1)*k0,5) + 16*(-1 + Sqrt(1 + Power(k,2)/Power(4*c - Complex(0,1)*k0,2)))*Power(4*c - Complex(0,1)*k0,7))/(336.*Power(k,4)) - (Power(k,6)*(-35 + 16*Sqrt(1 + Power(k,2)/Power(5*c - Complex(0,1)*k0,2)))*(5*c - Complex(0,1)*k0) + 2*Power(k,4)*(-35 + 24*Sqrt(1 + Power(k,2)/Power(5*c - Complex(0,1)*k0,2)))*Power(5*c - Complex(0,1)*k0,3) + 8*Power(k,2)*(-7 + 6*Sqrt(1 + Power(k,2)/Power(5*c - Complex(0,1)*k0,2)))*Power(5*c - Complex(0,1)*k0,5) + 16*(-1 + Sqrt(1 + Power(k,2)/Power(5*c - Complex(0,1)*k0,2)))*Power(5*c - Complex(0,1)*k0,7))/(1680.*Power(k,4)) + (Complex(0,0.0005952380952380953)*(Power(k,6)*(35*k0 - 16*Sqrt(-Power(k,2) + Power(k0,2))) + 16*Power(k0,6)*(-k0 + Sqrt(-Power(k,2) + Power(k0,2))) - 8*Power(k,2)*Power(k0,4)*(-7*k0 + 6*Sqrt(-Power(k,2) + Power(k0,2))) + 2*Power(k,4)*Power(k0,2)*(-35*k0 + 24*Sqrt(-Power(k,2) + Power(k0,2)))))/Power(k,4))/Power(k0,5)