[ Diff(x[1], t) = (1*k[25]*piecewise(k[24] = 0, 41/1000, 33/1000) + 1*k[25]*piecewise(k[24] = 0, 11/200000, 11/100000)*(x[1] + x[2] + x[3] + x[4]) + 1*k[25]*piecewise(k[24] = 0, 27/10000, 11/20000)*x[4] + (-1)*k[25]*piecewise(k[24] = 0, 33/100, 1/2)*(x[5] + x[6] + x[7])*piecewise(k[24] = 0, 43/10, 19)/(piecewise(k[24] = 0, 33/100, 1/2)*(x[5] + x[6] + x[7]) + piecewise(k[24] = 0, 43/10, 19)*(x[1] + x[2] + x[3] + x[4]))*piecewise(k[24] = 0, 11/500, 11/500)*x[7]/(x[5] + x[6] + x[7])*x[1] + (-1)*k[25]*(piecewise(k[24] = 0, 11/1250000, 1/62500) + piecewise(k[24] = 0, 1/5000000, 3/10000000)*(x[1] + x[2] + x[3] + x[4]))*x[1])/k[25],
  Diff(x[2], t) = (1*k[25]*piecewise(k[24] = 0, 33/100, 1/2)*(x[5] + x[6] + x[7])*piecewise(k[24] = 0, 43/10, 19)/(piecewise(k[24] = 0, 33/100, 1/2)*(x[5] + x[6] + x[7]) + piecewise(k[24] = 0, 43/10, 19)*(x[1] + x[2] + x[3] + x[4]))*piecewise(k[24] = 0, 11/500, 11/500)*x[7]/(x[5] + x[6] + x[7])*x[1] + (-1)*k[25]*piecewise(k[24] = 0, 1/10, 1/10)*x[2] + (-1)*k[25]*(piecewise(k[24] = 0, 11/1250000, 1/62500) + piecewise(k[24] = 0, 1/5000000, 3/10000000)*(x[1] + x[2] + x[3] + x[4]))*x[2])/k[25],
  Diff(x[3], t) = (1*k[25]*piecewise(k[24] = 0, 1/10, 1/10)*x[2] + (-1)*k[25]*piecewise(k[24] = 0, 7/2000, 7/2000)*x[3] + (-1)*k[25]*piecewise(k[24] = 0, 9/500000, 9/100000)*x[3] + (-1)*k[25]*(piecewise(k[24] = 0, 11/1250000, 1/62500) + piecewise(k[24] = 0, 1/5000000, 3/10000000)*(x[1] + x[2] + x[3] + x[4]))*x[3])/k[25],
  Diff(x[4], t) = ((-1)*k[25]*piecewise(k[24] = 0, 27/10000, 11/20000)*x[4] + 1*k[25]*piecewise(k[24] = 0, 7/2000, 7/2000)*x[3] + (-1)*k[25]*(piecewise(k[24] = 0, 11/1250000, 1/62500) + piecewise(k[24] = 0, 1/5000000, 3/10000000)*(x[1] + x[2] + x[3] + x[4]))*x[4])/k[25],
  Diff(x[5], t) = (1*k[26]*piecewise(k[24] = 0, 13/100, 13/100)*(x[5] + x[6] + x[7]) + (-1)*k[26]*piecewise(k[24] = 0, 33/100, 1/2)*piecewise(k[24] = 0, 43/10, 19)*(x[1] + x[2] + x[3] + x[4])/(piecewise(k[24] = 0, 33/100, 1/2)*(x[5] + x[6] + x[7]) + piecewise(k[24] = 0, 43/10, 19)*(x[1] + x[2] + x[3] + x[4]))*(piecewise(k[24] = 0, 6/25, 12/25)*x[3]/(x[1] + x[2] + x[3] + x[4]) + piecewise(k[24] = 0, 3/125, 6/125)*x[4]/(x[1] + x[2] + x[3] + x[4]))*x[5] + (-1)*k[26]*(piecewise(k[24] = 0, 33/1000, 33/1000) + piecewise(k[24] = 0, 1/25000, 1/50000)*(x[5] + x[6] + x[7]))*x[5])/k[26],
  Diff(x[6], t) = (1*k[26]*piecewise(k[24] = 0, 33/100, 1/2)*piecewise(k[24] = 0, 43/10, 19)*(x[1] + x[2] + x[3] + x[4])/(piecewise(k[24] = 0, 33/100, 1/2)*(x[5] + x[6] + x[7]) + piecewise(k[24] = 0, 43/10, 19)*(x[1] + x[2] + x[3] + x[4]))*(piecewise(k[24] = 0, 6/25, 12/25)*x[3]/(x[1] + x[2] + x[3] + x[4]) + piecewise(k[24] = 0, 3/125, 6/125)*x[4]/(x[1] + x[2] + x[3] + x[4]))*x[5] + (-1)*k[26]*piecewise(k[24] = 0, 83/1000, 91/1000)*x[6] + (-1)*k[26]*(piecewise(k[24] = 0, 33/1000, 33/1000) + piecewise(k[24] = 0, 1/25000, 1/50000)*(x[5] + x[6] + x[7]))*x[6])/k[26],
  Diff(x[7], t) = (1*k[26]*piecewise(k[24] = 0, 83/1000, 91/1000)*x[6] + (-1)*k[26]*(piecewise(k[24] = 0, 33/1000, 33/1000) + piecewise(k[24] = 0, 1/25000, 1/50000)*(x[5] + x[6] + x[7]))*x[7])/k[26] ]