{ diff(x1, t) = ((-1)*k5*k8*x1/(k7 + x1) + 1*k5*k12*x3/(k11 + x3) + (-1)*k5*k23*x1 + 1*k5*k44*x9)/k5,
  diff(x2, t) = ((-1)*k5*k10*x2/(k9 + x2) + 1*k5*k14*x4/(k13 + x4) + (-1)*k5*k24*x2 + 1*k5*k45*x10)/k5,
  diff(x3, t) = (1*k5*k8*x1/(k7 + x1) + (-1)*k5*k12*x3/(k11 + x3) + (-1)*k5*k16*x3/(k15 + x3) + 1*k5*k20*x5/(k19 + x5) + (-1)*k5*k25*x3)/k5,
  diff(x4, t) = (1*k5*k10*x2/(k9 + x2) + (-1)*k5*k14*x4/(k13 + x4) + (-1)*k5*k18*x4/(k17 + x4) + 1*k5*k22*x6/(k21 + x6) + (-1)*k5*k26*x4)/k5,
  diff(x5, t) = (1*k5*k16*x3/(k15 + x3) + (-1)*k5*k20*x5/(k19 + x5) + (-1)*(k5*k27*x5 + k5*k28*x5/(k29 + x5)) + (-1)*(k5*k32*x5*x6 - k5*k33*x7))/k5,
  diff(x6, t) = (1*k5*k18*x4/(k17 + x4) + (-1)*k5*k22*x6/(k21 + x6) + (-1)*(k5*k30*x6 + k5*k4*x6/(k31 + x6)) + (-1)*(k5*k32*x5*x6 - k5*k33*x7))/k5,
  diff(x7, t) = (1*(k5*k32*x5*x6 - k5*k33*x7) + (-1)*(k5*k34*x7 - k6*k35*x8) + (-1)*k5*k36*x7)/k5,
  diff(x8, t) = (1*(k5*k34*x7 - k6*k35*x8) + (-1)*k6*k37*x8)/k6,
  diff(x9, t) = (1*k5*k38*k39^k40/(k39^k40 + x8^k40) + (-1)*(k5*k46*x9 + k5*k47*x9/(k48 + x9)))/k5,
  diff(x10, t) = (1*k5*k41*k42^k43/(k42^k43 + x8^k43) + (-1)*(k5*k49*x10 + k5*k3*x10/(k50 + x10)))/k5 }