[ Eq(Derivative(x1, t), ((-1)*k3*k4*k5*x1*x2 + 1*k3*k6*x3 + (-1)*k3*k11*k12*k13*(x1/(1/4))**(9/25))/k3),
  Eq(Derivative(x2, t), ((-1)*k3*k4*k5*x1*x2 + 1*k3*k6*x3 + (-1)*k3*k17*k18*k19*x5*x2 + 1*k3*1/20*k24*k25*k26*(x3/(1/4))**(9/25))/k3),
  Eq(Derivative(x3, t), (1*k3*k4*k5*x1*x2 + (-1)*k3*k6*x3 + (-1)*k3*k7*k8*x3 + 1*k3*k9*k10*x4 + (-1)*k3*k21*k22*k23*(x3/(1/4))**(9/25) + (-1)*k3*k30*k31*k32*(x3/(1/4))**(9/25))/k3),
  Eq(Derivative(x4, t), (1*k3*k7*k8*x3 + (-1)*k3*k9*k10*x4 + (-1)*k3*k14*k15*k16*x4)/k3),
  Eq(Derivative(x5, t), (1*k3*k11*k12*k13*(x1/(1/4))**(9/25) + (-1)*k3*k17*k18*k19*x5*x2 + (-1)*k3*k20*x5 + 1*k3*1/200*k27*k28*k29*(x3/(1/4))**(9/25))/k3),
  Eq(Derivative(x6, t), (1*k3*k14*k15*k16*x4 + 1*k3*k17*k18*k19*x5*x2 + 1*k3*k21*k22*k23*(x3/(1/4))**(9/25))/k3) ]