<chr_var letter="A" var="2">A2</chr_var> tant li un<chr_var letter="s" var="long">∫</chr_var> u<chr_abbr type="reg" class="dc" expan="er" cert="no">[apost]</chr_abbr><chr_var letter="s" var="long">∫</chr_var> lau<chr_abbr type="reg" class="sc" expan="tre" cert="no">t-e</chr_abbr> po<chr_abbr type="reg" class="dc" expan="in" cert="no">i-hbar</chr_abbr>t. 