double complex function ttbqqbqqpp(k1,k2,k3,k4,k5,k6,k7)
      implicit none
      include 'constants.f'
      include 'sprods_com.f'
      include 'zprods_com.f'
      include 'masses.f'
      integer k1,k2,k3,k4,k5,k6,k7
      double precision s129,mtsq
      s129=s(k1,k2)+s(k1,k3)+s(k2,k3)
      mtsq=mt**2
      ttbqqbqqpp =  + xn**(-1)*s129**(-1) * (  - 1/(za(k1,k3))/(za(k5,
     &    k3))*za(k1,k5)**2*za(k6,k7)*zb(k2,k6)*zb(k4,k5) + 1/(za(k2,k3
     &    ))*za(k1,k5)*za(k6,k7)*zb(k4,k5)*zb(k6,k3) + 1/(za(k2,k3))/(
     &    za(k5,k3))*za(k1,k5)*za(k2,k5)*za(k6,k7)*zb(k2,k6)*zb(k4,k5)
     &     )
      ttbqqbqqpp = ttbqqbqqpp + xn**(-1)*mtsq*s129**(-1) * ( 1/(za(k1,
     &    k3))/(za(k5,k3))*za(k1,k5)*za(k1,k7)*zb(k2,k4) - 1/(za(k2,k3)
     &    )*za(k1,k7)*zb(k4,k3) - 1/(za(k2,k3))/(za(k5,k3))*za(k1,k7)*
     &    za(k2,k5)*zb(k2,k4) )

      return
      end