<chr_abbr type="reg" class="ss" expan="com" cert="no">com</chr_abbr> <chr_abbr type="reg" class="dc" expan="que" cert="no">q-hbar</chr_abbr><chr_var letter="s" var="long">∫</chr_var> a<chr_abbr type="reg" class="dc" expan="" cert="no">m-til</chr_abbr><chr_var letter="s" var="long">∫</chr_var> b<chr_abbr type="reg" class="dc" expan="" cert="no">n-hbar</chr_abbr> ne <chr_abbr type="reg" class="ss" expan="com" cert="no">com</chr_abbr>nut 