{ diff(x1, t) = ((-1)*k13*x26*x1/(k19*x25/k17 + 1)*k33 + 1*k14*x8*x2/k31*k33 + 1*k14*x8*x3/k31*k33 + 1*k14*x8*x4/k31*k33 + 1*k14*x8*x5/k31*k33)/k33,
  diff(x2, t) = (1*k13*x26*x1/(k19*x25/k17 + 1)*k33 + (-1)*k14*x8*x2/k31*k33 + (-1)*k10*x2/(k19*x25/k17 + 1)*k33 + (-1)*3*k10*x2/((k19*x25/k17 + 1)*(k11*x6 + 1))*k33)/k33,
  diff(x3, t) = (1*k10*x2/(k19*x25/k17 + 1)*k33 + (-1)*3*k10*x3/((k19*x25/k17 + 1)*(k11*x6 + 1))*k33 + (-1)*k14*x8*x3/k31*k33)/k33,
  diff(x4, t) = (1*3*k10*x2/((k19*x25/k17 + 1)*(k11*x6 + 1))*k33 + (-1)*k10*x4/(k19*x25/k17 + 1)*k33 + (-1)*k14*x8*x4/k31*k33)/k33,
  diff(x5, t) = (1*3*k10*x3/((k19*x25/k17 + 1)*(k11*x6 + 1))*k33 + 1*k10*x4/(k19*x25/k17 + 1)*k33 + (-1)*k14*x8*x5/k31*k33)/k33,
  diff(x6, t) = (-1)*k12*x6*(x5 + x3)/k30*k33/k33,
  diff(x7, t) = ((-1)*k15*x7*(x2 + x5 + x3 + x4)/k30*k33 + 1*k16*x8*k33)/k33,
  diff(x8, t) = (1*k15*x7*(x2 + x5 + x3 + x4)/k30*k33 + (-1)*k16*x8*k33)/k33,
  diff(x9, t) = ((-1)*k26*x9*(x2 + x5 + x3 + x4)/(k30*(k19*x25/k17 + 1))*k33 + (-1)*k25*x9*(x5 + x3)^2/(k30^2*(k4*x18/k2 + 1)*(k19*x25/k17 + 1))*k33 + 1*k27*x11*k34)/k33,
  diff(x10, t) = (1*k26*x9*(x2 + x5 + x3 + x4)/(k30*(k19*x25/k17 + 1))*k33 + 1*k25*x9*(x5 + x3)^2/(k30^2*(k4*x18/k2 + 1)*(k19*x25/k17 + 1))*k33 + (-1)*k28*x10*k33)/k33,
  diff(x11, t) = (1*k28*x10*k33 + (-1)*k27*x11*k34)/k34,
  diff(x12, t) = (1*(-k6*k7*x11*(k1 - 1)/k32*k34) + (-1)*k5*x12*k34)/k34,
  diff(x13, t) = (1*k5*x12*k34 + (-1)*k5*x13*k34)/k34,
  diff(x14, t) = (1*k5*x13*k34 + (-1)*k5*x14*k34)/k34,
  diff(x15, t) = (1*k5*x14*k34 + (-1)*k5*x15*k34)/k34,
  diff(x16, t) = (1*k5*x15*k34 + (-1)*k5*x16*k34)/k34,
  diff(x17, t) = (1*k5*x16*k34 + (-1)*k7*x17*k33)/k33,
  diff(x18, t) = (1*k2*k8*x17/k6*k33 + (-1)*k8*x18*k33 + 1*k9*k2*k8*k3)/k33,
  diff(x19, t) = (1*(-k21*k22*x11*(k1 - 1)/k32*k34) + (-1)*k20*x19*k34)/k34,
  diff(x20, t) = (1*k20*x19*k34 + (-1)*k20*x20*k34)/k34,
  diff(x21, t) = (1*k20*x20*k34 + (-1)*k20*x21*k34)/k34,
  diff(x22, t) = (1*k20*x21*k34 + (-1)*k20*x22*k34)/k34,
  diff(x23, t) = (1*k20*x22*k34 + (-1)*k20*x23*k34)/k34,
  diff(x24, t) = (1*k20*x23*k34 + (-1)*k22*x24*k33)/k33,
  diff(x25, t) = (1*k17*k23*x24/k21*k33 + (-1)*k23*x25*k33 + 1*k24*k17*k23*k18)/k33,
  diff(x26, t) = 0/k33 }