k26 + k2*x6 + k10*x12 + k20*x5 - k25*x1 + k22*x13 - k1*x1*x2 - k9*x1*x11 - k19*x1*x3 - k21*x1*x10 
k28 + k2*x6 + k12*x3 - k27*x2 - k1*x1*x2 - k5*x2*x8 - k11*x2*x4 
k20*x5 - k12*x3 - k31*x3 + k11*x2*x4 - k19*x1*x3 
k30 + k12*x3 + k14*x5 + k16*x10 + k18*x13 + k24*x9 - k29*x4 - k11*x2*x4 - k13*x4*x6 - k15*x4*x11 - k17*x4*x12 - k23*x4*x8 
k13*x4*x6 - k20*x5 - k32*x5 - k14*x5 + k19*x1*x3 
k14*x5 - k2*x6 - k33*x6 + k1*x1*x2 - k6*x6*x8 - k13*x4*x6 
k35 - k34*x7 - k3*x2*x7 - k4*x6*x7 - k7*x7*x11 - k8*x7*x12 
k24*x9 - k36*x8 + k3*x2*x7 + k4*x6*x7 + k7*x7*x11 + k8*x7*x12 - k23*x4*x8 
k23*x4*x8 - k37*x9 - k24*x9 
k22*x13 - k16*x10 - k38*x10 + k15*x4*x11 - k21*x1*x10 
k10*x12 + k16*x10 - k39*x11 + k5*x2*x8 - k9*x1*x11 - k15*x4*x11 
k18*x13 - k10*x12 - k40*x12 + k6*x6*x8 + k9*x1*x11 - k17*x4*x12 
k21*x1*x10 - k22*x13 - k41*x13 - k18*x13 + k17*x4*x12 
