[ Eq(Derivative(x1, t), 0),
  Eq(Derivative(x2, t), 0),
  Eq(Derivative(x3, t), 0),
  Eq(Derivative(x4, t), (1*k29*k10 + (-1)*k31*k14*x4 + (-1)*k31*k11*x15*x4/((k23*x15 + x4)*(1 + (x13/k28)**k20)))/k31),
  Eq(Derivative(x5, t), 0),
  Eq(Derivative(x6, t), ((-1)*k30*k2*x10*x6 + (-1)*k30*k3*x7*x6 + 1*k31*k16*x24*x12 + (-1)*k30*k12*x6)/k30),
  Eq(Derivative(x7, t), (1*k30*k2*x10*x6 + (-1)*k30*k3*x7*x6)/k30),
  Eq(Derivative(x8, t), 0),
  Eq(Derivative(x9, t), (1*k30*k3*x7*x6 + (-1)*k30*k4*x9*x15)/k30),
  Eq(Derivative(x10, t), (1*k29*k1/(1 + (x14/k22)**k19) + (-1)*k30*k2*x10*x6)/k30),
  Eq(Derivative(x11, t), (1*k29*k13 + (-1)*k30*k7*x11*x16)/k30),
  Eq(Derivative(x13, t), (1*k30*k4*x9*x15 + (-1)*k30*k5*x13*x18 + (-1)*k30*k17*x13)/k30),
  Eq(Derivative(x14, t), (1*k30*k5*x13*x18 + (-1)*k30*k6*x14)/k30),
  Eq(Derivative(x15, t), ((-3)*k30*k4*x9*x15 + 2*k30*k7*x11*x16 + 4*k31*k9*x19*x16 + (-1)*k31*k11*x15*x4/((k23*x15 + x4)*(1 + (x13/k28)**k20)))/k30),
  Eq(Derivative(x17, t), (1*k30*k7*x11*x16 + (-1)*k30*k15*x17 + (-1)*k31*k8*x17*x20)/k30),
  Eq(Derivative(x18, t), ((-1)*k30*k5*x13*x18 + 1*k30*k15*x17 + (-1)*k30*k18*x18)/k30),
  Eq(Derivative(x19, t), (1*k31*k8*x17*x20 + (-1)*k31*k9*x19*x16)/k31),
  Eq(Derivative(x21, t), 0),
  Eq(Derivative(x22, t), 0),
  Eq(Derivative(x24, t), ((-1)*k31*k16*x24*x12 + 1*k31*3*k11*x15*x4/((k23*x15 + x4)*(1 + (x13/k28)**k20))*x23/(k21 + x23))/k31),
  Eq(Derivative(x25, t), 0),
  Eq(Derivative(x26, t), 0) ]