{ diff(x1, t) = ((-1)*k17*x1^k18*x4^k19*x6^k20 + (-1)*k34*x1^k35*x2^k36*x4^k37*x8^k38*k114^k39 + (-1)*k64*x1^k65*x8^k66*x15^k67 + (-1)*k73*x1^k74*x2^k75*x13^k76 + 1*k93*x1^k94*x4^k95*x8^k96*k113^k97*k114^k98 + (-1)*k99*x1^k100)/k1,
  diff(x2, t) = (1*k13*x4^k14*x8^k15*k114^k16 + (-1)*k24*x2^k25*x4^k26*x8^k27*k114^k28 + 1*k34*x1^k35*x2^k36*x4^k37*x8^k38*k114^k39 + 1*k53*x2^k54*x4^k55*x7^k56*x8^k57 + 1*k73*x1^k74*x2^k75*x13^k76 + (-1)*k81*x2^k82*x7^k83*x8^k84 + (-1)*k85*x2^k86*k114^k87)/k1,
  diff(x3, t) = (1*k24*x2^k25*x4^k26*x8^k27*k114^k28 + (-1)*k29*x3^k30*x4^k31)/k1,
  diff(x4, t) = ((-1)*k2*x4^k3 + (-1)*k9*x4^k10*x9^k11*x10^k12 + (-1)*k13*x4^k14*x8^k15*k114^k16 + 1*k17*x1^k18*x4^k19*x6^k20 + (-1)*k21*x4^k22*x8^k23 + 1*k29*x3^k30*x4^k31 + (-1)*k88*x4^k89*x5^k90 + 1*k101*x11^k102 + 1*k105*x5^k106)/k1,
  diff(x5, t) = (1*k88*x4^k89*x5^k90 + (-1)*k91*x5^k92 + (-1)*k105*x5^k106)/k1,
  diff(x6, t) = ((-1)*k4*x6^k5 + (-1)*k17*x1^k18*x4^k19*x6^k20 + 1*k91*x5^k92)/k1,
  diff(x7, t) = ((-1)*k58*x4^k59*x7^k60 + 1*k81*x2^k82*x7^k83*x8^k84)/k1,
  diff(x8, t) = ((-1)*k49*x8^k50*x9^k51*x10^k52 + (-1)*k53*x2^k54*x4^k55*x7^k56*x8^k57 + 1*k58*x4^k59*x7^k60 + (-1)*k61*x8^k62*k114^k63 + 1*k64*x1^k65*x8^k66*x15^k67 + (-1)*k68*x4^k69*x8^k70 + 1*k103*x11^k104)/k1,
  diff(x9, t) = ((-1)*k6*x9^k7*x10^k8 + 1*k9*x4^k10*x9^k11*x10^k12 + (-1)*k32*x9^k33 + 1*k42*x12^k43)/k1,
  diff(x10, t) = ((-1)*k40*x10^k41 + 1*k44*x12^k45 + (-1)*k46*x9^k47*x10^k48 + 1*k49*x8^k50*x9^k51*x10^k52)/k1,
  diff(x11, t) = (1*k21*x4^k22*x8^k23 + 1*k68*x4^k69*x8^k70 + (-1)*k101*x11^k102 + (-1)*k103*x11^k104)/k1,
  diff(x12, t) = (1*k6*x9^k7*x10^k8 + (-1)*k42*x12^k43 + (-1)*k44*x12^k45 + 1*k46*x9^k47*x10^k48)/k1,
  diff(x13, t) = (1*k2*x4^k3 + 1*k32*x9^k33 + (-1)*k73*x1^k74*x2^k75*x13^k76 + (-1)*k77*x13^k78 + (-1)*k79*x13^k80 + 1*k85*x2^k86*k114^k87)/k1,
  diff(x14, t) = (1*k71*x15^k72 + 1*k79*x13^k80 + (-1)*k109*x14^k110 + (-1)*k111*x14^k112)/k1,
  diff(x15, t) = (1*k40*x10^k41 + 1*k61*x8^k62*k114^k63 + (-1)*k64*x1^k65*x8^k66*x15^k67 + (-1)*k71*x15^k72)/k1,
  diff(x16, t) = ((-1)*k107*x16^k108 + 1*k111*x14^k112)/k1,
  diff(x17, t) = 0,
  diff(x18, t) = 0 }