[ Eq(1*k2*x1 + 1*k2*x2, k2*k49),
  Eq(1*k2*x3 + 1*k2*x4 + 1*k2*x5, k2*k50),
  Eq(1*k2*x6 + 1*k2*x7 + 1*k2*x8 + 1*k2*x12 + 1*k2*x17 + 1*k2*x18, k2*k51) ]