[ Diff(x[1], t) = (1*k[39]*k[1]*x[1]*(1 - x[1]/k[2]) + (-1)*k[39]*k[3]*x[5]/(x[5] + k[4])*x[2]*x[1]/(k[7] + x[1])*(k[5] + k[6]*(1 - k[5])/(x[3] + k[6])))/k[39],
  Diff(x[2], t) = (1*k[39]*k[8]*x[6]*x[1]/(x[6]*x[1] + k[9])*(k[10] + k[11]*(1 - k[10])/(x[3] + k[11])) + (-1)*k[39]*k[12]*x[2] + 1*k[39]*(piecewise(And(And(piecewise(Xor(t < 0, 120 < 0), t - 120*ceil(t/120), t - 120*floor(t/120)) >= 0, piecewise(Xor(t < 0, 120 < 0), t - 120*ceil(t/120), t - 120*floor(t/120)) <= k[38]), t < 360), k[29]/k[38], 0) + piecewise(And(And(And(piecewise(Xor(t < 0, 120 < 0), t - 120*ceil(t/120), t - 120*floor(t/120)) >= 0, piecewise(Xor(t < 0, 120 < 0), t - 120*ceil(t/120), t - 120*floor(t/120)) <= k[38]), t > 1440), t < 1800), k[37]/k[38], 0) + piecewise(And(And(And(piecewise(Xor(t < 0, 120 < 0), t - 120*ceil(t/120), t - 120*floor(t/120)) >= 0, piecewise(Xor(t < 0, 120 < 0), t - 120*ceil(t/120), t - 120*floor(t/120)) <= k[38]), t > 2880), t < 3240), k[37]/k[38], 0) + piecewise(And(And(And(piecewise(Xor(t < 0, 120 < 0), t - 120*ceil(t/120), t - 120*floor(t/120)) >= 0, piecewise(Xor(t < 0, 120 < 0), t - 120*ceil(t/120), t - 120*floor(t/120)) <= k[38]), t > 4320), t < 4680), k[37]/k[38], 0) + piecewise(And(And(And(piecewise(Xor(t < 0, 120 < 0), t - 120*ceil(t/120), t - 120*floor(t/120)) >= 0, piecewise(Xor(t < 0, 120 < 0), t - 120*ceil(t/120), t - 120*floor(t/120)) <= k[38]), t > 5760), t < 6120), k[37]/k[38], 0)))/k[39],
  Diff(x[3], t) = (1*k[39]*k[13] + 1*k[39]*k[5]*x[1] + (-1)*k[39]*k[15]*x[3])/k[39],
  Diff(x[4], t) = (1*k[39]*k[16]*x[2] + (-1)*k[39]*k[17]*x[4])/k[39],
  Diff(x[5], t) = (1*k[39]*k[18] + 1*k[39]*k[40] + (-1)*k[39]*k[21]*x[5])/k[39],
  Diff(x[6], t) = (1*k[39]*k[41] + (-1)*k[39]*k[26]*x[6])/k[39] ]