 ${  \begingroup   \def\mathaccent#T##0{    \rel@kern{0.0}    \overline{\rel@kern{-0.0}\macc@nucleus\rel@kern{0.0}}    \rel@kern{-0.0}  }  \macc@depth\@ne   \let\math@bgroup\@empty \let\math@egroup\macc@set@skewchar   \mathsurround\z@ \frozen@everymath{\mathgroup\macc@group\relax}  \macc@set@skewchar\relax   \let\mathaccentV\macc@nested@a   \macc@nested@a\relax000{T}  \endgroup }$ 