documentclass{article}
usepackage{amsmath}

begin{document}


begin{align}
R = left{(S_1,S_1), (S_1,S_4), (S_4,S_4), (S_4,S_1), (S_2,S_2), (S_2,S_3),    (S_3,S_3), (S_3,S_2), (S_0,S_0), \
(S_0, S_5), (S_5,S_5) , (S_5,S_0)right}
end{align}

end{document}