[ Eq(Derivative(x1, t), (1*k1*k4*x1**2*(x2 - x1)/(k5**2 + x1**2) + 1*k1*k6*(x2 - x1) + (-1)*k2*k7*x1 + 1*k1*x3*(k8*x1**2/(k9**2 + x1**2) + k10) + (-1)*k3*k11*x1**8/(k12**8 + x1**8) + 1*k1*k13*x4 + (-1)*k1*k14*x1*x5)/k1),
  Eq(Derivative(x2, t), (-1/4*k1*k4*x1**2*(x2 - x1)/(k5**2 + x1**2) + -1/4*k1*k6*(x2 - x1) + 1/4*k2*k7*x1)/k2),
  Eq(Derivative(x3, t), (-1/4*k1*x3*(k8*x1**2/(k9**2 + x1**2) + k10) + 1/4*k3*k11*x1**8/(k12**8 + x1**8))/k3),
  Eq(Derivative(x4, t), ((-1)*k1*k13*x4 + 1*k1*k14*x1*x5)/k1),
  Eq(Derivative(x5, t), (1*k1*k13*x4 + (-1)*k1*k14*x1*x5)/k1) ]