[ Eq(Derivative(x1, t), (1*k22*(2*k1/(1 + k8*x3**k13) - 1)*k2/(1 + k7*x3**k12)*x1 + 1*k22*2*k4/(1 + k9*x3**k14)*x2*k5/(1 + k11*x1**k16)*(1 - k3/(1 + k10*x3**k15)))/k22),
  Eq(Derivative(x2, t), (1*k22*2*k2/(1 + k7*x3**k12)*x1*(1 - k1/(1 + k8*x3**k13)) + 1*k22*(2*k3/(1 + k10*x3**k15) - 1)*k4/(1 + k9*x3**k14)*x2)/k22),
  Eq(Derivative(x3, t), (1*k22*2*k4/(1 + k9*x3**k14)*x2*(1 - k3/(1 + k10*x3**k15))*(1 - k5/(1 + k11*x1**k16)) + (-1)*k22*k6*x3)/k22) ]