documentclass{beamer}
usepackage{graphics}
mode<presentation> {
usepackage{breqn}
usetheme{Frankfurt}
usepackage{amsmath}
usepackage{amsfonts}
usepackage{amssymb}



 begin{align*}
           bar{v}sim {|Omega|over 4epsilon DN}left[1+{epsilonover pi}logleft(frac{2}{epsilon}right)+frac{epsilon}{pi}left(-frac{9N}{5}+2(N-2)log 2\+frac{3}{2}+frac{4}{N}mathcal{H}(x_1,dots,x_N)right)right]
        end{align*}