[ Diff(x[1], t) = (1*k[11]*k[3]*k[4] + (-3)*k[11]*k[5]*x[1]*(x[3] + 3*x[2] - (6*x[3]*x[2] - 3*x[2]^2 + x[3]^2)^(1/2))/6)/k[11],
  Diff(x[2], t) = ((-1)*k[11]*k[5]*x[1]*(x[3] + 3*x[2] - (6*x[3]*x[2] - 3*x[2]^2 + x[3]^2)^(1/2))/6 + 1*k[11]*k[6]*((x[3] + 3*x[2] - (6*x[3]*x[2] - 3*x[2]^2 + x[3]^2)^(1/2))/6)^(13/25)*((7*x[3] - 3*x[2] - (6*x[3]*x[2] - 3*x[2]^2 + x[3]^2)^(1/2))/6)^(41/100) + (-1)*k[11]*2*k[7])/k[11],
  Diff(x[3], t) = 1*k[11]*k[7]*(1 - k[8]*((x[3] + 3*x[2] - (6*x[3]*x[2] - 3*x[2]^2 + x[3]^2)^(1/2))/6)^k[9]*((7*x[3] - 3*x[2] - (6*x[3]*x[2] - 3*x[2]^2 + x[3]^2)^(1/2))/6)^k[10])/k[11] ]