{ diff(x1, t) = (1*k1*k3*(k74 - x1) + (-1)*(k1*k4/k5*x1/k6/(1 + x1/k6 + (k7*x1/k6 + 1)/(k7*x2/k6 + 1)*(1 + x2/k6 + x4/k8 + x2*x4/(k6*k9))) - k2*k10/k5*x2/k6/(1 + x2/k6 + (k7*x2/k6 + 1)/(k7*x1/k6 + 1)*(1 + x1/k6) + x4/k8 + x2*x4/(k6*k9))))/k1,
  diff(x2, t) = (59*(k1*k4/k5*x1/k6/(1 + x1/k6 + (k7*x1/k6 + 1)/(k7*x2/k6 + 1)*(1 + x2/k6 + x4/k8 + x2*x4/(k6*k9))) - k2*k10/k5*x2/k6/(1 + x2/k6 + (k7*x2/k6 + 1)/(k7*x1/k6 + 1)*(1 + x1/k6) + x4/k8 + x2*x4/(k6*k9))) + (-1)*k2*k11*x3*x2/(k12*k13 + k14*x3 + k13*x2 + x2*x3))/k2,
  diff(x3, t) = ((-1)*k2*k11*x3*x2/(k12*k13 + k14*x3 + k13*x2 + x2*x3) + (-1)*k2*k20*x6^2/(k21*(1 + k22*x3/x22*x3/x22) + x6^2) + 1*k2*(k42*x11*x5 - k43*x13*x3) + 1*k2*k44*x5*x13/((k45 + x13)*(k46 + x5)) + (-1)*k2*k68*x3*x4 + (-1)*k2*k69*x3 + (-1)*k2*(k70*x22*x3 - k71*x5^2))/k2,
  diff(x4, t) = (1*k2*k11*x3*x2/(k12*k13 + k14*x3 + k13*x2 + x2*x3) + (-1)*k2*(k15*x4/(k16 + x4 + k16/k17*x6) - k18*x6/k19/(k16 + x4 + k16/k17*x6)) + (-1)*k2*k68*x3*x4)/k2,
  diff(x5, t) = (1*k2*k11*x3*x2/(k12*k13 + k14*x3 + k13*x2 + x2*x3) + 1*k2*k20*x6^2/(k21*(1 + k22*x3/x22*x3/x22) + x6^2) + (-1)*k2*(k42*x11*x5 - k43*x13*x3) + (-1)*k2*k44*x5*x13/((k45 + x13)*(k46 + x5)) + 1*k2*k68*x3*x4 + 1*k2*k69*x3 + 2*k2*(k70*x22*x3 - k71*x5^2))/k2,
  diff(x6, t) = (1*k2*(k15*x4/(k16 + x4 + k16/k17*x6) - k18*x6/k19/(k16 + x4 + k16/k17*x6)) + (-1)*k2*k20*x6^2/(k21*(1 + k22*x3/x22*x3/x22) + x6^2))/k2,
  diff(x7, t) = (1*k2*k20*x6^2/(k21*(1 + k22*x3/x22*x3/x22) + x6^2) + (-1)*k2*(k23*x7/(k24 + x7 + x8*k25*k23/(k26*k23*k27) + x9*k28*k23/(k26*k23*k27) + x7*x8/k29 + x8*x9*k23/(k26*k23*k27)) - k23*x8*x9/k26/(k24 + x7 + x8*k25*k23/(k26*k23*k27) + x9*k28*k23/(k26*k23*k27) + x7*x8/k29 + x8*x9*k23/(k26*k23*k27))))/k2,
  diff(x8, t) = (1*k2*(k23*x7/(k24 + x7 + x8*k25*k23/(k26*k23*k27) + x9*k28*k23/(k26*k23*k27) + x7*x8/k29 + x8*x9*k23/(k26*k23*k27)) - k23*x8*x9/k26/(k24 + x7 + x8*k25*k23/(k26*k23*k27) + x9*k28*k23/(k26*k23*k27) + x7*x8/k29 + x8*x9*k23/(k26*k23*k27))) + 1*k2*(k30*x9/(k31 + x9 + k31/k32*x8) - k33*x8/k34/(k31 + x9 + k31/k32*x8)) + (-1)*k2*(k35*x8*x10/k36/k37/((1 + x8/k36 + x11/k38)*(1 + x10/k37 + x12/k39)) - k40*x11*x12/k41/k36/k37/((1 + x8/k36 + x11/k38)*(1 + x10/k37 + x12/k39))))/k2,
  diff(x9, t) = (1*k2*(k23*x7/(k24 + x7 + x8*k25*k23/(k26*k23*k27) + x9*k28*k23/(k26*k23*k27) + x7*x8/k29 + x8*x9*k23/(k26*k23*k27)) - k23*x8*x9/k26/(k24 + x7 + x8*k25*k23/(k26*k23*k27) + x9*k28*k23/(k26*k23*k27) + x7*x8/k29 + x8*x9*k23/(k26*k23*k27))) + (-1)*k2*(k30*x9/(k31 + x9 + k31/k32*x8) - k33*x8/k34/(k31 + x9 + k31/k32*x8)) + (-1)*k2*k55*x9/(k56*(1 + k57/x12*(1 + x10/k58)) + x9*(1 + k59/x12*(1 + x10/k58))))/k2,
  diff(x10, t) = ((-1)*k2*(k35*x8*x10/k36/k37/((1 + x8/k36 + x11/k38)*(1 + x10/k37 + x12/k39)) - k40*x11*x12/k41/k36/k37/((1 + x8/k36 + x11/k38)*(1 + x10/k37 + x12/k39))) + 1*k2*k49*x15*x12/((k50 + x12)*(k51 + x15)) + 1*k2*k55*x9/(k56*(1 + k57/x12*(1 + x10/k58)) + x9*(1 + k59/x12*(1 + x10/k58))))/k2,
  diff(x11, t) = (1*k2*(k35*x8*x10/k36/k37/((1 + x8/k36 + x11/k38)*(1 + x10/k37 + x12/k39)) - k40*x11*x12/k41/k36/k37/((1 + x8/k36 + x11/k38)*(1 + x10/k37 + x12/k39))) + (-1)*k2*(k42*x11*x5 - k43*x13*x3))/k2,
  diff(x12, t) = (1*k2*(k35*x8*x10/k36/k37/((1 + x8/k36 + x11/k38)*(1 + x10/k37 + x12/k39)) - k40*x11*x12/k41/k36/k37/((1 + x8/k36 + x11/k38)*(1 + x10/k37 + x12/k39))) + (-1)*k2*k49*x15*x12/((k50 + x12)*(k51 + x15)) + (-1)*k2*k55*x9/(k56*(1 + k57/x12*(1 + x10/k58)) + x9*(1 + k59/x12*(1 + x10/k58))))/k2,
  diff(x13, t) = (1*k2*(k42*x11*x5 - k43*x13*x3) + (-1)*k2*k44*x5*x13/((k45 + x13)*(k46 + x5)))/k2,
  diff(x14, t) = (1*k2*k44*x5*x13/((k45 + x13)*(k46 + x5)) + (-1)*k2*k47*x14/(k48 + x14))/k2,
  diff(x15, t) = (1*k2*k47*x14/(k48 + x14) + (-1)*k2*k49*x15*x12/((k50 + x12)*(k51 + x15)) + (-59)*k63/k64*(k2*x15 - k1*x20))/k2,
  diff(x16, t) = (1*k2*k49*x15*x12/((k50 + x12)*(k51 + x15)) + (-59)*k52/k53*(k2*x16 - k1*x17))/k2,
  diff(x17, t) = (1*k52/k53*(k2*x16 - k1*x17) + (-1)*k1*k54*x17)/k1,
  diff(x18, t) = (1*k2*k55*x9/(k56*(1 + k57/x12*(1 + x10/k58)) + x9*(1 + k59/x12*(1 + x10/k58))) + (-59)*k60/k61*(k2*x18 - k1*x19))/k2,
  diff(x19, t) = (1*k60/k61*(k2*x18 - k1*x19) + (-1)*k1*k62*x19)/k1,
  diff(x20, t) = (1*k63/k64*(k2*x15 - k1*x20) + (-1)*k1*k65*x20 + (-1)*k1*k66*x20*x21)/k1,
  diff(x21, t) = ((-1)*k1*k66*x20*x21 + 1*k1*k67*(k73 - x21))/k1,
  diff(x22, t) = (-1)*k2*(k70*x22*x3 - k71*x5^2)/k2,
  diff(x23, t) = 0,
  diff(x24, t) = 0,
  diff(x25, t) = 0 }