{ diff(x1, t) = ((-1)*k1*k3*x1*x9/(k4*k5*(1 + x1/k4 + x9/k5 + x1*x9/(k4*k5))) + 1*k1*(k6*x2*x3/(k7*k8) - k9*x1*x4/(k10*k11))/(1 + x3/k12 + x4/k13 + x2*(1/k7 + x3/(k7*k8)) + x1*(1/k10 + x3/(k10*k12) + x4/(k13*k10*k11/k13))) + (-1)*(k1*k25*x1 - k2*k25*x6))/k1,
  diff(x2, t) = (1*k1*k3*x1*x9/(k4*k5*(1 + x1/k4 + x9/k5 + x1*x9/(k4*k5))) + (-1)*k1*(k6*x2*x3/(k7*k8) - k9*x1*x4/(k10*k11))/(1 + x3/k12 + x4/k13 + x2*(1/k7 + x3/(k7*k8)) + x1*(1/k10 + x3/(k10*k12) + x4/(k13*k10*k11/k13))) + (-1)*(k1*k27*x2 - k2*k27*x7))/k1,
  diff(x3, t) = ((-1)*k1*(k6*x2*x3/(k7*k8) - k9*x1*x4/(k10*k11))/(1 + x3/k12 + x4/k13 + x2*(1/k7 + x3/(k7*k8)) + x1*(1/k10 + x3/(k10*k12) + x4/(k13*k10*k11/k13))) + (-1)*(k1*k24*x3 - k2*k24*x8))/k1,
  diff(x4, t) = (1*k1*(k6*x2*x3/(k7*k8) - k9*x1*x4/(k10*k11))/(1 + x3/k12 + x4/k13 + x2*(1/k7 + x3/(k7*k8)) + x1*(1/k10 + x3/(k10*k12) + x4/(k13*k10*k11/k13))) + (-1)*(k1*k26*x4 - k2*k26*x5))/k1,
  diff(x5, t) = (1*k2*(k14*x7*x8/(k15*k16) - k17*x6*x5/(k18*k19))/(1 + x8/k20 + x5/k21 + x7*(1/k15 + x8/(k15*k16)) + x6*(1/k18 + x8/(k18*k20) + x5/(k21*k18*k19/k21))) + 1*(k1*k26*x4 - k2*k26*x5))/k2,
  diff(x6, t) = (1*k2*(k14*x7*x8/(k15*k16) - k17*x6*x5/(k18*k19))/(1 + x8/k20 + x5/k21 + x7*(1/k15 + x8/(k15*k16)) + x6*(1/k18 + x8/(k18*k20) + x5/(k21*k18*k19/k21))) + 1*k2*k22*x7 + 1*(k1*k25*x1 - k2*k25*x6))/k2,
  diff(x7, t) = ((-1)*k2*(k14*x7*x8/(k15*k16) - k17*x6*x5/(k18*k19))/(1 + x8/k20 + x5/k21 + x7*(1/k15 + x8/(k15*k16)) + x6*(1/k18 + x8/(k18*k20) + x5/(k21*k18*k19/k21))) + (-1)*k2*k22*x7 + 1*(k1*k27*x2 - k2*k27*x7))/k2,
  diff(x8, t) = ((-1)*k2*(k14*x7*x8/(k15*k16) - k17*x6*x5/(k18*k19))/(1 + x8/k20 + x5/k21 + x7*(1/k15 + x8/(k15*k16)) + x6*(1/k18 + x8/(k18*k20) + x5/(k21*k18*k19/k21))) + 1*(k1*k24*x3 - k2*k24*x8))/k2,
  diff(x9, t) = ((-1)*k1*k3*x1*x9/(k4*k5*(1 + x1/k4 + x9/k5 + x1*x9/(k4*k5))) + (-1)*(k1*k23*x9 - k2*k23*x10))/k1,
  diff(x10, t) = (1*k2*k22*x7 + 1*(k1*k23*x9 - k2*k23*x10))/k2 }