[ Diff(x[1], t) = (1*k[41]*k[1] + (-1)*k[41]*k[2]*x[1])/k[41],
  Diff(x[2], t) = (1*k[41]*k[3]*x[1] + (-1)*k[41]*k[4]*x[2])/k[41],
  Diff(x[3], t) = (1*k[41]*k[5]*x[1] + (-1)*k[41]*k[6]*x[3] + 1*k[41]*k[5]*x[2])/k[41],
  Diff(x[4], t) = (1*k[41]*k[7]*x[3] + (-1)*k[41]*k[8]*x[4] + 1*k[41]*k[7]*x[5] + 1*k[41]*k[7]*x[19] + 1*k[41]*k[7]*x[13])/k[41],
  Diff(x[5], t) = (1*k[41]*k[9]*x[3] + (-1)*k[41]*k[10]*x[5] + 1*k[41]*k[9]*x[2])/k[41],
  Diff(x[6], t) = (1*k[41]*k[11]*x[4] + (-1)*k[41]*k[13]*x[6] + 1*k[41]*k[11]*x[10] + 1*k[41]*k[11]*x[11] + 1*k[41]*k[11]*x[15] + 1*k[41]*k[11]*x[7] + 1*k[41]*k[11]*x[17] + (-1)*k[41]*k[13]*x[6]*x[16]*k[43])/k[41],
  Diff(x[7], t) = (1*k[41]*k[12]*x[4] + (-1)*k[41]*k[14]*x[7] + 1*k[41]*k[12]*x[15] + 1*k[41]*k[12]*x[16])/k[41],
  Diff(x[8], t) = (1*k[41]*k[15]*x[5] + (-1)*k[41]*k[16]*x[8])/k[41],
  Diff(x[9], t) = (1*k[41]*k[17]*x[8] + (-1)*k[41]*k[18]*x[9] + 1*k[41]*k[17]*x[16])/k[41],
  Diff(x[10], t) = (1*k[41]*k[19]*x[9] + (-1)*k[41]*k[20]*x[10] + 1*k[41]*k[19]*x[20])/k[41],
  Diff(x[11], t) = (1*k[41]*k[21] + (-1)*k[41]*k[22]*x[11] + (-1)*k[41]*k[22]*x[11]*x[18]*k[42])/k[41],
  Diff(x[12], t) = (1*k[41]*k[29]*x[6] + (-1)*k[41]*k[30]*x[12])/k[41],
  Diff(x[13], t) = (1*k[41]*k[27]*x[19] + (-1)*k[41]*k[28]*x[13]*x[12])/k[41],
  Diff(x[14], t) = ((-1)*k[41]*k[24]*x[14]*x[12] + 1*k[41]*k[23]*x[18] + 1*k[41]*k[23]*x[13])/k[41],
  Diff(x[15], t) = (1*k[41]*k[31] + (-1)*k[41]*k[32]*x[15])/k[41],
  Diff(x[16], t) = (1*k[41]*k[33]*x[15] + (-1)*k[41]*k[34]*x[16])/k[41],
  Diff(x[17], t) = (1*k[41]*k[35]*x[15] + (-1)*k[41]*k[36]*x[17] + 1*k[41]*k[35]*x[7])/k[41],
  Diff(x[18], t) = (1*k[41]*k[37]*x[2] + (-1)*k[41]*k[38]*x[18])/k[41],
  Diff(x[19], t) = (1*k[41]*k[39]*x[2] + (-1)*k[41]*k[40]*x[19] + 1*k[41]*k[39]*x[14])/k[41],
  Diff(x[20], t) = (1*k[41]*k[25]*x[14] + 1*k[41]*k[25]*x[13] + (-1)*k[41]*k[26]*x[20])/k[41] ]