{ diff(x1, t) = ((-1)*k32*(k1*x1 + k2*(x5 + x17)*x1/(k3 + x1)) + 1*k32*k17 + (-1)*k32*k19*x1)/k32,
  diff(x2, t) = (1*k32*(k1*x1 + k2*(x5 + x17)*x1/(k3 + x1)) + (-1)*k32*(k4*x2*x9 - k5*x3) + 1*k32*k15*x6 + 1*k32*k6*x5 + (-1)*k32*(k11*x2*x8 - k12*x10) + (-1)*k32*(k23*x2*x14 - k24*x18) + 1*k32*k26*x17)/k32,
  diff(x3, t) = (1*k32*(k4*x2*x9 - k5*x3) + (-1)*k32*(k9*x3 - k10*x4) + (-1)*k32*(k23*x3*x14 - k24*x15))/k32,
  diff(x4, t) = (1*k32*(k9*x3 - k10*x4) + (-1)*k32*k7*x13*x4/(k8 + x4 + x16) + (-1)*k32*(k23*x4*x14 - k24*x16))/k32,
  diff(x5, t) = (1*k32*k7*x13*x4/(k8 + x4 + x16) + (-1)*k32*(k11*x5*x8 - k12*x6) + (-1)*k32*k6*x5 + 1*k32*(k29*x17 - k23*x5*x14))/k32,
  diff(x6, t) = (1*k32*(k11*x5*x8 - k12*x6) + (-1)*k32*k15*x6)/k32,
  diff(x7, t) = (1*k32*k15*x6 + 1*k32*k6*x5 + 1*k32*k26*x17)/k32,
  diff(x8, t) = ((-1)*k32*(k11*x5*x8 - k12*x6) + 1*k32*k15*x6 + (-1)*k32*(k11*x2*x8 - k12*x10) + 1*k32*k13*x10*x11/(k14 + x10) + 1*k32*k21 + (-1)*k32*k22*x8)/k32,
  diff(x9, t) = ((-1)*k32*(k4*x2*x9 - k5*x3) + 1*k32*k18 + (-1)*k32*k20*x9 + (-1)*k32*(k4*x18*x9 - k5*x16))/k32,
  diff(x10, t) = (1*k32*(k11*x2*x8 - k12*x10) + (-1)*k32*k13*x10*x11/(k14 + x10))/k32,
  diff(x11, t) = 0/k32,
  diff(x12, t) = 1*k32*k13*x10*x11/(k14 + x10)/k32,
  diff(x13, t) = 0/k32,
  diff(x14, t) = ((-1)*k32*(k23*x2*x14 - k24*x18) + 1*k32*(k29*x17 - k23*x5*x14) + 1*k32*k26*x17 + (-1)*k32*(k23*x3*x14 - k24*x15) + (-1)*k32*(k23*x4*x14 - k24*x16) + 1*k32*k30 + (-1)*k32*k31*x14)/k32,
  diff(x15, t) = ((-1)*k32*(k9*x15 - k10*x16) + 1*k32*(k23*x3*x14 - k24*x15))/k32,
  diff(x16, t) = (1*k32*(k4*x18*x9 - k5*x16) + 1*k32*(k9*x15 - k10*x16) + (-1)*k32*k7*x13*x16/(k8 + x4 + x16) + 1*k32*(k23*x4*x14 - k24*x16))/k32,
  diff(x17, t) = (1*k32*k7*x13*x16/(k8 + x4 + x16) + (-1)*k32*(k29*x17 - k23*x5*x14) + (-1)*k32*k26*x17)/k32,
  diff(x18, t) = (1*k32*(k23*x2*x14 - k24*x18) + (-1)*k32*(k4*x18*x9 - k5*x16))/k32 }