[ Eq(x32, Piecewise((0, Lt(t, 0)), (0, True))),
  Eq(x33, Piecewise((0, Lt(t, 0)), (1, True))),
  Eq(x34, x2),
  Eq(x35, x6),
  Eq(x36, x8),
  Eq(x37, x10 + x12),
  Eq(x38, x11 + x12),
  Eq(x39, x15),
  Eq(x40, x17),
  Eq(x41, x19),
  Eq(x42, x21 + x23),
  Eq(x43, x22 + x23),
  Eq(x44, x25 + x27),
  Eq(x45, x26 + x27),
  Eq(1*k61*x1 + 1*k61*x2 + 1*k61*x3, k61*k62),
  Eq(1*k61*x4 + 1*k61*x5 + 1*k61*x6, k61*k63),
  Eq(1*k61*x7 + 1*k61*x8, k61*k64),
  Eq(1*k61*x9 + 1*k61*x10 + 1*k61*x11 + 1*k61*x12, k61*k65),
  Eq(1*k61*x13 + 1*k61*x14 + 1*k61*x15, k61*k66),
  Eq(1*k61*x16 + 1*k61*x17, k61*k67),
  Eq(1*k61*x18 + 1*k61*x19, k61*k68),
  Eq(1*k61*x20 + 1*k61*x21 + 1*k61*x22 + 1*k61*x23, k61*k69),
  Eq(1*k61*x24 + 1*k61*x25 + 1*k61*x26 + 1*k61*x27, k61*k70),
  Eq(1*k61*x28 + 1*k61*x29, k61*k71),
  Eq(1*k61*x30 + 1*k61*x31, k61*k72) ]