Package: Org mode version 9.2.2 (9.2.2-18-g0ff705-elpaplus @
/home/sdorof/.emacs.d/elpa/25.3/develop/org-plus-contrib-20190325/)

 The command

 \marginnote{$A_{BC}$}

 will be exported to LaTeX as

 \marginnote\{\(A_{BC}\)\}

 while expected

 \marginnote{\(A_{BC}\)}

However, if don't use nested {}, it will be exported as expected.

Date: Sat, 06 Apr 2019 11:22:07 +0300
Message-ID:
<87wok7k0gg.fsf@b586.i-did-not-set--mail-host-address--so-tickle-me>