<chr_abbr type="reg" class="dc" expan="Que" cert="no">Q-hbar</chr_abbr> ma<chr_var letter="s" var="long">∫</chr_var> en <chr_abbr type="frq" class="ss" expan="est" cert="no">est</chr_abbr> <chr_abbr type="frq" class="ss" expan="et" cert="yes">et1</chr_abbr> e<chr_var letter="s" var="long">∫</chr_var>perdu<chr_var letter="s" var="long">∫</chr_var> 