{ diff(x1, t) = 0,
  diff(x2, t) = (1*k3*(k90 - x2)/k4/(1 + (k90 + x2)/k4 + k5*k90*x2/k4^2) + (-1)*k1*k6*(x2*x3/(k7*k8) - x4*x5/(k7*k8*k9))/((1 + x2/k7 + x4/k10)*(1 + x3/k8 + x5/k11)))/k1,
  diff(x3, t) = ((-1)*k1*k6*(x2*x3/(k7*k8) - x4*x5/(k7*k8*k9))/((1 + x2/k7 + x4/k10)*(1 + x3/k8 + x5/k11)) + (-1)*k1*k16*k17*x6/k18*x3/k19*(1 + x6/k18 + x3/k19 + k17*x6/k18*x3/k19)/((1 + x6/k18 + x3/k19 + k17*x6/k18*x3/k19)^2 + k20*((1 + k21*x3/k22)/(1 + x3/k22))^2*((1 + k23*x8/k24)/(1 + x8/k24))^2*((1 + k25*k91/k26 + k27*x7/k28)/(1 + k91/k26 + x7/k28))^2*(1 + k29*x3/k19)^2) + 1*k1*k45*(k46*x13*x5 - x15*x3)/(k47*k48)/((1 + x13/k49 + x15/k47)*(1 + x5/k50 + x3/k48)) + 1*k1*k59*(x17*x5/(k60*k61) - x18*x3/(k60*k61*k62))/((1 + x17/k60 + x18/k63)*(1 + x5/k61 + x3/k64)) + (-1)*k1*k78*x3 + 1*k1*(k79*x5*x5 - k80*x3*x8) + (-1)*k1*k87 + (-1)*k1*k88)/k1,
  diff(x4, t) = (1*k1*k6*(x2*x3/(k7*k8) - x4*x5/(k7*k8*k9))/((1 + x2/k7 + x4/k10)*(1 + x3/k8 + x5/k11)) + (-1)*k1*k12*(x4/k13 - x6/(k13*k14))/(1 + x4/k13 + x6/k15) + (-1)*k1*k87 + (-2)*k1*k88)/k1,
  diff(x5, t) = (1*k1*k6*(x2*x3/(k7*k8) - x4*x5/(k7*k8*k9))/((1 + x2/k7 + x4/k10)*(1 + x3/k8 + x5/k11)) + 1*k1*k16*k17*x6/k18*x3/k19*(1 + x6/k18 + x3/k19 + k17*x6/k18*x3/k19)/((1 + x6/k18 + x3/k19 + k17*x6/k18*x3/k19)^2 + k20*((1 + k21*x3/k22)/(1 + x3/k22))^2*((1 + k23*x8/k24)/(1 + x8/k24))^2*((1 + k25*k91/k26 + k27*x7/k28)/(1 + k91/k26 + x7/k28))^2*(1 + k29*x3/k19)^2) + (-1)*k1*k45*(k46*x13*x5 - x15*x3)/(k47*k48)/((1 + x13/k49 + x15/k47)*(1 + x5/k50 + x3/k48)) + (-1)*k1*k59*(x17*x5/(k60*k61) - x18*x3/(k60*k61*k62))/((1 + x17/k60 + x18/k63)*(1 + x5/k61 + x3/k64)) + 1*k1*k78*x3 + (-2)*k1*(k79*x5*x5 - k80*x3*x8) + 1*k1*k87 + 1*k1*k88)/k1,
  diff(x6, t) = (1*k1*k12*(x4/k13 - x6/(k13*k14))/(1 + x4/k13 + x6/k15) + (-1)*k1*k16*k17*x6/k18*x3/k19*(1 + x6/k18 + x3/k19 + k17*x6/k18*x3/k19)/((1 + x6/k18 + x3/k19 + k17*x6/k18*x3/k19)^2 + k20*((1 + k21*x3/k22)/(1 + x3/k22))^2*((1 + k23*x8/k24)/(1 + x8/k24))^2*((1 + k25*k91/k26 + k27*x7/k28)/(1 + k91/k26 + x7/k28))^2*(1 + k29*x3/k19)^2))/k1,
  diff(x7, t) = (1*k1*k16*k17*x6/k18*x3/k19*(1 + x6/k18 + x3/k19 + k17*x6/k18*x3/k19)/((1 + x6/k18 + x3/k19 + k17*x6/k18*x3/k19)^2 + k20*((1 + k21*x3/k22)/(1 + x3/k22))^2*((1 + k23*x8/k24)/(1 + x8/k24))^2*((1 + k25*k91/k26 + k27*x7/k28)/(1 + k91/k26 + x7/k28))^2*(1 + k29*x3/k19)^2) + (-1)*k1*k30*(x7/k31 - x10*x11/(k31*k32))/(1 + x7/k31 + x10/k33 + x11/k34 + x7*x11/(k31*k35) + x10*x11/(k33*k34)))/k1,
  diff(x8, t) = 1*k1*(k79*x5*x5 - k80*x3*x8)/k1,
  diff(x9, t) = 0,
  diff(x10, t) = (1*k1*k30*(x7/k31 - x10*x11/(k31*k32))/(1 + x7/k31 + x10/k33 + x11/k34 + x7*x11/(k31*k35) + x10*x11/(k33*k34)) + (-1)*k1*(k36*x10 - k37*x11) + (-1)*k1*k81*(x10/k82*x14/k83 - k94/k82*x12/k83*1/k84)/((1 + x10/k82 + k94/k85)*(1 + x14/k83 + x12/k86)))/k1,
  diff(x11, t) = (1*k1*k30*(x7/k31 - x10*x11/(k31*k32))/(1 + x7/k31 + x10/k33 + x11/k34 + x7*x11/(k31*k35) + x10*x11/(k33*k34)) + 1*k1*(k36*x10 - k37*x11) + (-1)*k1*k38*(k39*x11*x12/(k40*k41) - k42*x13*x14/(k43*k44))/((1 + x11/k40 + x13/k43)*(1 + x12/k41 + x14/k44)))/k1,
  diff(x12, t) = ((-1)*k1*k38*(k39*x11*x12/(k40*k41) - k42*x13*x14/(k43*k44))/((1 + x11/k40 + x13/k43)*(1 + x12/k41 + x14/k44)) + (-1)*k1*k68*(k93*x12/(k69*k70) - x19*x14/(k69*k70*k71))/(1 + x12/k70 + k93*k72/(k70*k69) + x19*k73/(k74*k75) + x14/k74 + k93*x12/(k70*k69) + x12*x19*k73/(k70*k74*k75) + k93*x14*k72/(k70*k74*k69) + x19*x14/(k75*k74) + k93*x12*x19/(k70*k76*k69) + k93*x19*x14/(k77*k74*k75)) + 1*k1*k81*(x10/k82*x14/k83 - k94/k82*x12/k83*1/k84)/((1 + x10/k82 + k94/k85)*(1 + x14/k83 + x12/k86)) + (-3)*k1*k89*x19)/k1,
  diff(x13, t) = (1*k1*k38*(k39*x11*x12/(k40*k41) - k42*x13*x14/(k43*k44))/((1 + x11/k40 + x13/k43)*(1 + x12/k41 + x14/k44)) + (-1)*k1*k45*(k46*x13*x5 - x15*x3)/(k47*k48)/((1 + x13/k49 + x15/k47)*(1 + x5/k50 + x3/k48)))/k1,
  diff(x14, t) = (1*k1*k38*(k39*x11*x12/(k40*k41) - k42*x13*x14/(k43*k44))/((1 + x11/k40 + x13/k43)*(1 + x12/k41 + x14/k44)) + 1*k1*k68*(k93*x12/(k69*k70) - x19*x14/(k69*k70*k71))/(1 + x12/k70 + k93*k72/(k70*k69) + x19*k73/(k74*k75) + x14/k74 + k93*x12/(k70*k69) + x12*x19*k73/(k70*k74*k75) + k93*x14*k72/(k70*k74*k69) + x19*x14/(k75*k74) + k93*x12*x19/(k70*k76*k69) + k93*x19*x14/(k77*k74*k75)) + (-1)*k1*k81*(x10/k82*x14/k83 - k94/k82*x12/k83*1/k84)/((1 + x10/k82 + k94/k85)*(1 + x14/k83 + x12/k86)) + 3*k1*k89*x19)/k1,
  diff(x15, t) = (1*k1*k45*(k46*x13*x5 - x15*x3)/(k47*k48)/((1 + x13/k49 + x15/k47)*(1 + x5/k50 + x3/k48)) + (-1)*k1*k51*(x15/k52 - x16/(k52*k53))/(1 + x15/k52 + x16/k54))/k1,
  diff(x16, t) = (1*k1*k51*(x15/k52 - x16/(k52*k53))/(1 + x15/k52 + x16/k54) + (-1)*k1*k55*(x16/k56 - x17/(k56*k57))/(1 + x16/k56 + x17/k58))/k1,
  diff(x17, t) = (1*k1*k55*(x16/k56 - x17/(k56*k57))/(1 + x16/k56 + x17/k58) + (-1)*k1*k59*(x17*x5/(k60*k61) - x18*x3/(k60*k61*k62))/((1 + x17/k60 + x18/k63)*(1 + x5/k61 + x3/k64)))/k1,
  diff(x18, t) = (1*k1*k59*(x17*x5/(k60*k61) - x18*x3/(k60*k61*k62))/((1 + x17/k60 + x18/k63)*(1 + x5/k61 + x3/k64)) + (-1)*k1*k65*(x18/k66)^k67/(1 + (x18/k66)^k67))/k1,
  diff(x19, t) = (1*k1*k65*(x18/k66)^k67/(1 + (x18/k66)^k67) + 1*k1*k68*(k93*x12/(k69*k70) - x19*x14/(k69*k70*k71))/(1 + x12/k70 + k93*k72/(k70*k69) + x19*k73/(k74*k75) + x14/k74 + k93*x12/(k70*k69) + x12*x19*k73/(k70*k74*k75) + k93*x14*k72/(k70*k74*k69) + x19*x14/(k75*k74) + k93*x12*x19/(k70*k76*k69) + k93*x19*x14/(k77*k74*k75)) + (-2)*k1*k89*x19)/k1,
  diff(x20, t) = 0,
  diff(x21, t) = 0,
  diff(x22, t) = 0,
  diff(x23, t) = 0,
  diff(x24, t) = 0,
  diff(x25, t) = 0 }