C e<chr_var letter="s" var="long">∫</chr_var>t<chr_abbr type="reg" class="dc" expan="er" cert="no">[apost]</chr_abbr> b<chr_abbr type="reg" class="dc" expan="" cert="no">n-hbar</chr_abbr> en<chr_var letter="s" var="long">∫</chr_var>a<chr_abbr type="" class="" expan="" cert="no">[apost]</chr_abbr>igne<chr_var letter="s" var="long">∫</chr_var> v<chr_abbr type="" class="" expan="" cert="no">[apost]</chr_abbr>aie<chr_var letter="s" var="long">∫</chr_var> 