BookML test: math variants

BookML: v0.28.5
LaTeXML: 0.8.8
LaTeX: 2018/12/01

`\emptyset`	`\varnothing`
$\emptyset$	$\varnothing$

Letter	`\mathcal`	`\mathscr`
A	$\mathcal{A}$	$\mathscr{A}$
B	$\mathcal{B}$	$\mathscr{B}$
C	$\mathcal{C}$	$\mathscr{C}$
D	$\mathcal{D}$	$\mathscr{D}$
E	$\mathcal{E}$	$\mathscr{E}$
F	$\mathcal{F}$	$\mathscr{F}$
G	$\mathcal{G}$	$\mathscr{G}$
H	$\mathcal{H}$	$\mathscr{H}$
I	$\mathcal{I}$	$\mathscr{I}$
J	$\mathcal{J}$	$\mathscr{J}$
K	$\mathcal{K}$	$\mathscr{K}$
L	$\mathcal{L}$	$\mathscr{L}$
M	$\mathcal{M}$	$\mathscr{M}$
N	$\mathcal{N}$	$\mathscr{N}$
O	$\mathcal{O}$	$\mathscr{O}$
P	$\mathcal{P}$	$\mathscr{P}$
Q	$\mathcal{Q}$	$\mathscr{Q}$
R	$\mathcal{R}$	$\mathscr{R}$
S	$\mathcal{S}$	$\mathscr{S}$
T	$\mathcal{T}$	$\mathscr{T}$
U	$\mathcal{U}$	$\mathscr{U}$
V	$\mathcal{V}$	$\mathscr{V}$
W	$\mathcal{W}$	$\mathscr{W}$
X	$\mathcal{X}$	$\mathscr{X}$
Y	$\mathcal{Y}$	$\mathscr{Y}$
Z	$\mathcal{Z}$	$\mathscr{Z}$