*   Nterms = 77

 L  [A(f1,f2,b3,b4,b5)] =
       - chi1*ga(k3)*chi2*k1.e4*e3.e5*ss1^-1*ss4^-1
       + chi1*ga(k3)*chi2*k1.e5*e3.e4*ss1^-1*ss3^-1
       + chi1*ga(k3)*chi2*k1.e5*e3.e4*ss1^-1*ss4^-1
       - chi1*ga(k3)*chi2*k2.e4*e3.e5*ss1^-1*ss4^-1
       + chi1*ga(k3)*chi2*k2.e5*e3.e4*ss1^-1*ss3^-1
       + chi1*ga(k3)*chi2*k2.e5*e3.e4*ss1^-1*ss4^-1
       - chi1*ga(k3)*chi2*k3.e4*e3.e5*ss1^-1*ss3^-1
       - chi1*ga(k3)*chi2*k3.e4*e3.e5*ss1^-1*ss4^-1
       + chi1*ga(k3)*chi2*k3.e5*e3.e4*ss1^-1*ss3^-1
       + chi1*ga(k3)*chi2*k3.e5*e3.e4*ss1^-1*ss4^-1
       + chi1*ga(k3)*chi2*k4.e3*e4.e5*ss1^-1*ss3^-1
       + chi1*ga(k3)*chi2*k4.e3*e4.e5*ss1^-1*ss4^-1
       - chi1*ga(k4)*chi2*k1.e3*e4.e5*ss1^-1*ss4^-1
       - chi1*ga(k4)*chi2*k2.e3*e4.e5*ss1^-1*ss4^-1
       - chi1*ga(k4)*chi2*k2.e3*e4.e5*ss2^-1*ss4^-1
       - chi1*ga(k4)*chi2*k3.e4*e3.e5*ss1^-1*ss3^-1
       + chi1*ga(k4)*chi2*k3.e5*e3.e4*ss1^-1*ss3^-1
       + chi1*ga(k4)*chi2*k4.e3*e4.e5*ss1^-1*ss3^-1
       + 1/2*chi1*ga(k4)*ga(e3)*ga(k3)*chi2*e4.e5*ss2^-1*ss4^-1
       + chi1*ga(e3)*chi2*k1.e4*k3.e5*ss1^-1*ss4^-1
       - chi1*ga(e3)*chi2*k1.e5*k3.e4*ss1^-1*ss3^-1
       - chi1*ga(e3)*chi2*k1.e5*k3.e4*ss1^-1*ss4^-1
       + chi1*ga(e3)*chi2*k2.e4*k3.e5*ss1^-1*ss4^-1
       - chi1*ga(e3)*chi2*k2.e5*k3.e4*ss1^-1*ss3^-1
       - chi1*ga(e3)*chi2*k2.e5*k3.e4*ss1^-1*ss4^-1
       - chi1*ga(e3)*chi2*e4.e5*ss1^-1
       - chi1*ga(e3)*chi2*e4.e5*ss1^-1*ss3*ss4^-1
       - chi1*ga(e4)*chi2*k1.e3*k1.e5*ss1^-1*ss4^-1
       - chi1*ga(e4)*chi2*k1.e3*k2.e5*ss1^-1*ss4^-1
       - chi1*ga(e4)*chi2*k1.e3*k3.e5*ss1^-1*ss4^-1
       - chi1*ga(e4)*chi2*k1.e5*k2.e3*ss1^-1*ss4^-1
       - chi1*ga(e4)*chi2*k1.e5*k2.e3*ss2^-1*ss4^-1
       + chi1*ga(e4)*chi2*k1.e5*k4.e3*ss1^-1*ss3^-1
       - chi1*ga(e4)*chi2*k2.e3*k2.e5*ss1^-1*ss4^-1
       - chi1*ga(e4)*chi2*k2.e3*k2.e5*ss2^-1*ss4^-1
       - chi1*ga(e4)*chi2*k2.e3*k3.e5*ss1^-1*ss4^-1
       - chi1*ga(e4)*chi2*k2.e3*k3.e5*ss2^-1*ss4^-1
       + chi1*ga(e4)*chi2*k2.e5*k4.e3*ss1^-1*ss3^-1
       + chi1*ga(e4)*chi2*e3.e5*ss1^-1
       + 1/2*chi1*ga(e4)*ga(e3)*ga(k3)*chi2*k1.e5*ss2^-1*ss4^-1
       + 1/2*chi1*ga(e4)*ga(e3)*ga(k3)*chi2*k2.e5*ss2^-1*ss4^-1
       + 1/2*chi1*ga(e4)*ga(e3)*ga(k3)*chi2*k3.e5*ss2^-1*ss4^-1
       + chi1*ga(e5)*chi2*k1.e3*k1.e4*ss1^-1*ss4^-1
       + chi1*ga(e5)*chi2*k1.e3*k2.e4*ss1^-1*ss4^-1
       + chi1*ga(e5)*chi2*k1.e3*k3.e4*ss1^-1*ss3^-1
       + chi1*ga(e5)*chi2*k1.e3*k3.e4*ss1^-1*ss4^-1
       + chi1*ga(e5)*chi2*k1.e4*k2.e3*ss1^-1*ss4^-1
       + chi1*ga(e5)*chi2*k1.e4*k2.e3*ss2^-1*ss4^-1
       - chi1*ga(e5)*chi2*k1.e4*k4.e3*ss1^-1*ss3^-1
       + chi1*ga(e5)*chi2*k2.e3*k2.e4*ss1^-1*ss4^-1
       + chi1*ga(e5)*chi2*k2.e3*k2.e4*ss2^-1*ss4^-1
       + chi1*ga(e5)*chi2*k2.e3*k2.e4*ss2^-1*ss5^-1
       + chi1*ga(e5)*chi2*k2.e3*k3.e4*ss1^-1*ss3^-1
       + chi1*ga(e5)*chi2*k2.e3*k3.e4*ss1^-1*ss4^-1
       + chi1*ga(e5)*chi2*k2.e3*k3.e4*ss2^-1*ss4^-1
       + chi1*ga(e5)*chi2*k2.e3*k3.e4*ss2^-1*ss5^-1
       + chi1*ga(e5)*chi2*k2.e3*k3.e4*ss3^-1*ss5^-1
       - chi1*ga(e5)*chi2*k2.e4*k4.e3*ss1^-1*ss3^-1
       - chi1*ga(e5)*chi2*k2.e4*k4.e3*ss3^-1*ss5^-1
       - chi1*ga(e5)*chi2*k3.e4*k4.e3*ss3^-1*ss5^-1
       - chi1*ga(e5)*chi2*e3.e4*ss1^-1*ss3^-1*ss4
       - chi1*ga(e5)*chi2*e3.e4*ss1^-1
       + chi1*ga(e5)*chi2*e3.e4*ss3^-1
       - chi1*ga(e5)*chi2*e3.e4*ss2*ss3^-1*ss5^-1
       - 1/2*chi1*ga(e5)*ga(k4)*ga(k3)*chi2*e3.e4*ss3^-1*ss5^-1
       + 1/2*chi1*ga(e5)*ga(k4)*ga(e3)*chi2*k3.e4*ss3^-1*ss5^-1
       - 1/2*chi1*ga(e5)*ga(e3)*ga(k3)*chi2*k1.e4*ss2^-1*ss4^-1
       - 1/2*chi1*ga(e5)*ga(e3)*ga(k3)*chi2*k2.e4*ss2^-1*ss4^-1
       - 1/2*chi1*ga(e5)*ga(e3)*ga(k3)*chi2*k2.e4*ss2^-1*ss5^-1
       - 1/2*chi1*ga(e5)*ga(e3)*ga(k3)*chi2*k3.e4*ss2^-1*ss4^-1
       - 1/2*chi1*ga(e5)*ga(e3)*ga(k3)*chi2*k3.e4*ss2^-1*ss5^-1
       - 1/2*chi1*ga(e5)*ga(e3)*ga(k3)*chi2*k3.e4*ss3^-1*ss5^-1
       + 1/2*chi1*ga(e5)*ga(e4)*ga(k3)*chi2*k4.e3*ss3^-1*ss5^-1
       - 1/2*chi1*ga(e5)*ga(e4)*ga(k4)*chi2*k2.e3*ss2^-1*ss5^-1
       + 1/2*chi1*ga(e5)*ga(e4)*ga(k4)*chi2*k4.e3*ss3^-1*ss5^-1
       + 1/4*chi1*ga(e5)*ga(e4)*ga(k4)*ga(e3)*ga(k3)*chi2*ss2^-1*ss5^-1
       - 1/2*chi1*ga(e5)*ga(e4)*ga(e3)*chi2*ss5^-1
      ;