[ Eq(Derivative(x1, t), ((-1)*k1*k2*x1 + 1*k1*k3*x2 + (-1)*k1*(k6*x1*x3 - k7*x6) + 1*k1*(k12*x7 - k13*x8*x1) + 1*k1*k24)/k1),
  Eq(Derivative(x2, t), (1*k1*k2*x1 + (-1)*k1*k3*x2 + (-1)*k1*k25*x2)/k1),
  Eq(Derivative(x3, t), ((-1)*k1*k4*x3 + 1*k1*k5*k26*x4 + (-1)*k1*(k6*x1*x3 - k7*x6) + (-1)*k1*x3*(k14*x3 + k15*x9) + 1*k1*k16*k26*x9 + 1*k1*k17*k26*x8 + 1*k1*k22)/k1),
  Eq(Derivative(x4, t), (1*k1*k4*x3 + (-1)*k1*k5*k26*x4 + (-1)*k1*k23*x4)/k1),
  Eq(Derivative(x5, t), 0),
  Eq(Derivative(x6, t), (1*k1*(k6*x1*x3 - k7*x6) + (-1)*k1*x6*(k8*x6 + k9*x7) + 1*k1*k10*k26*x7/(k11 + x7))/k1),
  Eq(Derivative(x7, t), (1*k1*x6*(k8*x6 + k9*x7) + (-1)*k1*k10*k26*x7/(k11 + x7) + (-1)*k1*(k12*x7 - k13*x8*x1))/k1),
  Eq(Derivative(x8, t), (1*k1*(k12*x7 - k13*x8*x1) + (-1)*k1*k17*k26*x8)/k1),
  Eq(Derivative(x9, t), (1*k1*x3*(k14*x3 + k15*x9) + (-1)*k1*k16*k26*x9)/k1),
  Eq(Derivative(x10, t), ((-1)*k1*x10*(k18*x9 + k19*x7 + k20*x8) + 1*k1*k21*x11)/k1),
  Eq(Derivative(x11, t), (1*k1*x10*(k18*x9 + k19*x7 + k20*x8) + (-1)*k1*k21*x11)/k1) ]