[ Diff(x[1], t) = piecewise(k[22] = 0, 1/2190, 1/2190)*piecewise(k[22] = 0, 1000, 1000) - piecewise(k[22] = 0, 33/100, 1/4)*(x[5] + x[6] + x[7])*piecewise(k[22] = 0, 19, 19)/(piecewise(k[22] = 0, 33/100, 1/4)*(x[5] + x[6] + x[7]) + piecewise(k[22] = 0, 19, 19)*(x[1] + x[3] + x[2] + x[4]))*piecewise(k[22] = 0, 21/100, 21/100)*x[7]/(x[5] + x[6] + x[7])*x[1] - piecewise(k[22] = 0, 1/2190, 1/2190)*x[1],
  Diff(x[2], t) = piecewise(k[22] = 0, 2/5, 2/5)*piecewise(k[22] = 0, 33/100, 1/4)*(x[5] + x[6] + x[7])*piecewise(k[22] = 0, 19, 19)/(piecewise(k[22] = 0, 33/100, 1/4)*(x[5] + x[6] + x[7]) + piecewise(k[22] = 0, 19, 19)*(x[1] + x[3] + x[2] + x[4]))*piecewise(k[22] = 0, 21/100, 21/100)*x[7]/(x[5] + x[6] + x[7])*x[1] - (piecewise(k[22] = 0, 1/2190, 1/2190) + piecewise(k[22] = 0, 1/4, 1/4))*x[2],
  Diff(x[3], t) = (1 - piecewise(k[22] = 0, 2/5, 2/5))*piecewise(k[22] = 0, 33/100, 1/4)*(x[5] + x[6] + x[7])*piecewise(k[22] = 0, 19, 19)/(piecewise(k[22] = 0, 33/100, 1/4)*(x[5] + x[6] + x[7]) + piecewise(k[22] = 0, 19, 19)*(x[1] + x[3] + x[2] + x[4]))*piecewise(k[22] = 0, 21/100, 21/100)*x[7]/(x[5] + x[6] + x[7])*x[1] - (piecewise(k[22] = 0, 1/2190, 1/2190) + piecewise(k[22] = 0, 1/4, 1/4) + piecewise(k[22] = 0, 1/10, 1/10))*x[3],
  Diff(x[4], t) = piecewise(k[22] = 0, 1/4, 1/4)*x[3] + piecewise(k[22] = 0, 1/4, 1/4)*x[2] - piecewise(k[22] = 0, 1/2190, 1/2190)*x[4],
  Diff(x[5], t) = (x[5] + x[6] + x[7] - piecewise(k[22] = 0, 1/10, 1/10)*x[7])/(x[5] + x[6] + x[7])*piecewise(k[22] = 0, 1/20, 1/14)*piecewise(k[22] = 0, 20000, 4000) - piecewise(k[22] = 0, 33/100, 1/4)*piecewise(k[22] = 0, 19, 19)*(x[1] + x[3] + x[2] + x[4])/(piecewise(k[22] = 0, 33/100, 1/4)*(x[5] + x[6] + x[7]) + piecewise(k[22] = 0, 19, 19)*(x[1] + x[3] + x[2] + x[4]))*(piecewise(k[22] = 0, 7/10, 7/10)*x[3]/(x[1] + x[3] + x[2] + x[4]) + piecewise(k[22] = 0, 3/10, 3/10)*x[2]/(x[1] + x[3] + x[2] + x[4]))*x[5] - piecewise(k[22] = 0, 1/20, 1/14)*x[5],
  Diff(x[6], t) = piecewise(k[22] = 0, 33/100, 1/4)*piecewise(k[22] = 0, 19, 19)*(x[1] + x[3] + x[2] + x[4])/(piecewise(k[22] = 0, 33/100, 1/4)*(x[5] + x[6] + x[7]) + piecewise(k[22] = 0, 19, 19)*(x[1] + x[3] + x[2] + x[4]))*(piecewise(k[22] = 0, 7/10, 7/10)*x[3]/(x[1] + x[3] + x[2] + x[4]) + piecewise(k[22] = 0, 3/10, 3/10)*x[2]/(x[1] + x[3] + x[2] + x[4]))*x[5] - (piecewise(k[22] = 0, 1/20, 1/14) + piecewise(k[22] = 0, 1/14, 1/14))*x[6],
  Diff(x[7], t) = piecewise(k[22] = 0, 1/10, 1/10)*x[7]/(x[5] + x[6] + x[7])*piecewise(k[22] = 0, 1/20, 1/14)*piecewise(k[22] = 0, 20000, 4000) + piecewise(k[22] = 0, 1/14, 1/14)*x[6] - piecewise(k[22] = 0, 1/20, 1/14)*x[7] ]