deletions | additions       diff --git a/untitled.tex b/untitled.tex  index d32c956..09157fd 100644  --- a/untitled.tex  +++ b/untitled.tex 
...
d\omega e^{-i\omega (t-t')} \frac{1}{2\pi}\int_{-\infty}^\infty d\epsilon_1 e^{-i\epsilon_1 (t-t')} \frac{1}{2\pi}\int_{-\infty}^\infty d\epsilon_2 e^{i\epsilon_2 (t-t')}  \\   \Biggr\{  V_{\beta k} V_{\gamma q}^{*} [G^>_{\beta\gamma}(\epsilon_1) G^<{h,t}_{qk}(\epsilon_2) G^{h,<}_{qk}(\epsilon_2)  - G^{>}_{\beta q}(\epsilon_1)G^{h,<}_{\gamma k}(\epsilon_2)] + V_{\beta k}^{*}V_{\gamma q} [G^{>,t}_{kq}(\epsilon_1) G{<}_{\gamma\beta}(\epsilon_2) G^{<}_{\gamma\beta}(\epsilon_2)  - G^{h,>}_{k\gamma}(\epsilon_1)G^{<}_{q \beta}(\epsilon_2)]\Biggr\}\,, \end{multline}