{ diff(x1, t) = ((-1)*k1*x1 + 1*(1 - k9)*k6*x1*(1 - (x1 + x2 + x3)/k5))/k14, diff(x2, t) = (1*k9*k6*x1*(1 - (x1 + x2 + x3)/k5) + (-1)*k2*x2 + 1*(1 - k13)*k10*x2*(1 - (x1 + x2 + x3)/k5))/k14, diff(x3, t) = (1*k13*k10*x2*(1 - (x1 + x2 + x3)/k5) + (-1)*k3*x3)/k14 }