C19 := (-v[6]*v[5]^3*v[4]*v[2]-1/40*v[6]^6*v[5]^2*v[4]*v[3]-1/4*v[6]^2*v[5]^4*
v[4]*v[3]-3/8*v[6]^4*v[5]*v[4]^2*v[3]-3/2*v[6]^2*v[5]^2*v[3]*v[2]+3/20*v[6]^5*
v[5]*v[4]*v[2]+1/4*v[6]^3*v[5]^2*v[4]^3+17/2240*v[6]^7*v[5]^4*v[4]+1/40*v[6]^6
*v[3]*v[2]+v[6]^2*v[5]*v[3]^3+79/492800*v[6]^11*v[5]^2*v[4]-1/40*v[6]^6*v[5]*v
[1]+1/2*v[6]^3*v[5]^3*v[3]^2+1/2*v[5]^3*v[4]^2*v[3]-1/40*v[6]^5*v[5]^3*v[4]^2+
1/32*v[6]^4*v[5]^5*v[3]+1/4*v[6]*v[5]^5*v[4]^2-3/492800*v[6]^13*v[5]^3-1/4*v[6
]^3*v[5]^4*v[2]+1/11200*v[6]^10*v[4]*v[3]-29/4480*v[6]^8*v[5]^3*v[3]-1/39424*v
[6]^12*v[5]*v[3]+1/2*v[6]^2*v[5]^3*v[1]+3/280*v[6]^7*v[5]^2*v[2]+1/280*v[6]^7*
v[5]*v[3]^2-1/2240*v[6]^9*v[5]*v[4]^2+1/16*v[6]^3*v[5]^6*v[4]+1/4480*v[6]^9*v[
5]^5+1/39424000*v[6]^17*v[5]-1/112*v[6]^5*v[5]^7-1/560*v[6]^7*v[4]^3-1/123200*
v[6]^11*v[2]+1/9856000*v[6]^15*v[4]-1/112*v[6]*v[5]^9-3/56*v[5]^7*v[3]+v[4]*v[
3]^3)*lambda[6];