[ Eq(Derivative(x1, t), (1*k41*k1 + (-1)*k41*k2*x1)/k41),
  Eq(Derivative(x2, t), (1*k41*k3*x1 + (-1)*k41*k4*x2)/k41),
  Eq(Derivative(x3, t), (1*k41*k5*x1 + (-1)*k41*k6*x3 + 1*k41*k5*x2)/k41),
  Eq(Derivative(x4, t), (1*k41*k7*x3 + (-1)*k41*k8*x4 + 1*k41*k7*x5 + 1*k41*k7*x19 + 1*k41*k7*x13)/k41),
  Eq(Derivative(x5, t), (1*k41*k9*x3 + (-1)*k41*k10*x5 + 1*k41*k9*x2)/k41),
  Eq(Derivative(x6, t), (1*k41*k11*x4 + (-1)*k41*k13*x6 + 1*k41*k11*x10 + 1*k41*k11*x11 + 1*k41*k11*x15 + 1*k41*k11*x7 + 1*k41*k11*x17 + (-1)*k41*k13*x6*x16*k43)/k41),
  Eq(Derivative(x7, t), (1*k41*k12*x4 + (-1)*k41*k14*x7 + 1*k41*k12*x15 + 1*k41*k12*x16)/k41),
  Eq(Derivative(x8, t), (1*k41*k15*x5 + (-1)*k41*k16*x8)/k41),
  Eq(Derivative(x9, t), (1*k41*k17*x8 + (-1)*k41*k18*x9 + 1*k41*k17*x16)/k41),
  Eq(Derivative(x10, t), (1*k41*k19*x9 + (-1)*k41*k20*x10 + 1*k41*k19*x20)/k41),
  Eq(Derivative(x11, t), (1*k41*k21 + (-1)*k41*k22*x11 + (-1)*k41*k22*x11*x18*k42)/k41),
  Eq(Derivative(x12, t), (1*k41*k29*x6 + (-1)*k41*k30*x12)/k41),
  Eq(Derivative(x13, t), (1*k41*k27*x19 + (-1)*k41*k28*x13*x12)/k41),
  Eq(Derivative(x14, t), ((-1)*k41*k24*x14*x12 + 1*k41*k23*x18 + 1*k41*k23*x13)/k41),
  Eq(Derivative(x15, t), (1*k41*k31 + (-1)*k41*k32*x15)/k41),
  Eq(Derivative(x16, t), (1*k41*k33*x15 + (-1)*k41*k34*x16)/k41),
  Eq(Derivative(x17, t), (1*k41*k35*x15 + (-1)*k41*k36*x17 + 1*k41*k35*x7)/k41),
  Eq(Derivative(x18, t), (1*k41*k37*x2 + (-1)*k41*k38*x18)/k41),
  Eq(Derivative(x19, t), (1*k41*k39*x2 + (-1)*k41*k40*x19 + 1*k41*k39*x14)/k41),
  Eq(Derivative(x20, t), (1*k41*k25*x14 + 1*k41*k25*x13 + (-1)*k41*k26*x20)/k41) ]