{ diff(x1, t) = ((-1)*k35*(k1*x1 - k2*x2) + (-1)*k35*(k12*x1*x11 - k13*x3))/k35,
  diff(x2, t) = 1*k35*(k1*x1 - k2*x2)/k35,
  diff(x3, t) = 1*k35*(k12*x1*x11 - k13*x3)/k35,
  diff(x4, t) = (-1)*k35*((k3*x2 + k4*x15)*x4 - k5*x5)/k35,
  diff(x5, t) = 1*k35*((k3*x2 + k4*x15)*x4 - k5*x5)/k35,
  diff(x6, t) = ((-1)*k35*(k6*x6*x5 - k7*x7) + (-1)*k35*(k31*x6*x26 - k32*x27))/k35,
  diff(x7, t) = 1*k35*(k6*x6*x5 - k7*x7)/k35,
  diff(x8, t) = (-1)*k35*(k8*x8*x7 - k9*x9)/k35,
  diff(x9, t) = 1*k35*(k8*x8*x7 - k9*x9)/k35,
  diff(x10, t) = (-1)*k35*(k10*x10*x9 - k11*x11)/k35,
  diff(x11, t) = 1*k35*(k10*x10*x9 - k11*x11)/k35,
  diff(x12, t) = (-1)*k35*(k29*x12*x7 - k30*x13)/k35,
  diff(x13, t) = 1*k35*(k29*x12*x7 - k30*x13)/k35,
  diff(x14, t) = ((-1)*k35*((k14 + k15*x12)*x14 - k16*x15) + (-1)*k35*(k27*x14*x25 - k28*x16))/k35,
  diff(x15, t) = 1*k35*((k14 + k15*x12)*x14 - k16*x15)/k35,
  diff(x16, t) = 1*k35*(k27*x14*x25 - k28*x16)/k35,
  diff(x17, t) = (-1)*k35*(k17*x17*x15 - k18*x18)/k35,
  diff(x18, t) = 1*k35*(k17*x17*x15 - k18*x18)/k35,
  diff(x19, t) = ((-1)*k35*(k19*x19*x18 - k20*x20) + (-1)*k35*(k25*x19*x25 - k26*x21))/k35,
  diff(x20, t) = 1*k35*(k19*x19*x18 - k20*x20)/k35,
  diff(x21, t) = 1*k35*(k25*x19*x25 - k26*x21)/k35,
  diff(x22, t) = ((-1)*k35*(k21*x22*x20 - k22*x23) + (-1)*k35*(k33*x22*x28 - k34*x29))/k35,
  diff(x23, t) = 1*k35*(k21*x22*x20 - k22*x23)/k35,
  diff(x24, t) = (-1)*k35*(k23*x24*x23 - k24*x25)/k35,
  diff(x25, t) = 1*k35*(k23*x24*x23 - k24*x25)/k35,
  diff(x26, t) = (-1)*k35*(k31*x6*x26 - k32*x27)/k35,
  diff(x27, t) = 1*k35*(k31*x6*x26 - k32*x27)/k35,
  diff(x28, t) = (-1)*k35*(k33*x22*x28 - k34*x29)/k35,
  diff(x29, t) = 1*k35*(k33*x22*x28 - k34*x29)/k35 }