[ Eq(Derivative(x1, t), (1*k3*(1 + k4*x3**4/(k5**4 + x3**4))*x1**2/(x1**2 + k7/(1 + x3**4/k6**4)) + (-1)*k10*x1 + 1*k11)/k8),
  Eq(Derivative(x2, t), (1*k15*x3**k17/(k16**k17 + x3**k17) + (-1)*k18*x2**k21/(k19**k21 + x2**k21)*x3**k22/(k20**k22 + x3**k22) + (-1)*k23*x2)/k9),
  Eq(Derivative(x3, t), (1*k12 + 1*k13*k14 + (-1)*k15*x3**k17/(k16**k17 + x3**k17) + 1*k18*x2**k21/(k19**k21 + x2**k21)*x3**k22/(k20**k22 + x3**k22) + 1*k23*x2 + (-1)*k24*x3)/k8) ]