[ Eq(Derivative(x1, t), (1*k11*k3*k4 + (-3)*k11*k5*x1*(x3 + 3*x2 - (6*x3*x2 - 3*x2**2 + x3**2)**(1/2))/6)/k11),
  Eq(Derivative(x2, t), ((-1)*k11*k5*x1*(x3 + 3*x2 - (6*x3*x2 - 3*x2**2 + x3**2)**(1/2))/6 + 1*k11*k6*((x3 + 3*x2 - (6*x3*x2 - 3*x2**2 + x3**2)**(1/2))/6)**(13/25)*((7*x3 - 3*x2 - (6*x3*x2 - 3*x2**2 + x3**2)**(1/2))/6)**(41/100) + (-1)*k11*2*k7)/k11),
  Eq(Derivative(x3, t), 1*k11*k7*(1 - k8*((x3 + 3*x2 - (6*x3*x2 - 3*x2**2 + x3**2)**(1/2))/6)**k9*((7*x3 - 3*x2 - (6*x3*x2 - 3*x2**2 + x3**2)**(1/2))/6)**k10)/k11) ]