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