[ Eq(Derivative(x1, t), (1*k15*k1 + (-1)*k15*k2*x1 + 1*k16*4*k3*k4**k5*x1**k5/((x1**k5 + k4**k5)*(x1**k5 + k6**k5))*x3**k7/(x3**k7 + k8**k7)*(x2 - x1) + (-1)*k15*k9*x1**2/(x1**2 + k10**2) + 1*k16*k11*(x2 - x1))/k15),
  Eq(Derivative(x2, t), ((-1)*k16*4*k3*k4**k5*x1**k5/((x1**k5 + k4**k5)*(x1**k5 + k6**k5))*x3**k7/(x3**k7 + k8**k7)*(x2 - x1) + 1*k15*k9*x1**2/(x1**2 + k10**2) + (-1)*k16*k11*(x2 - x1))/k16),
  Eq(Derivative(x3, t), (1*k15*k12*x1**2/(x1**2 + k13**2) + (-1)*k15*k14*x3)/k15) ]