Cases to fix: 

MMLTexVCUtilTest: 

set#655: nullary_macro_in_mbox16	\varstigma	# fix or otherwise skip 
set#554: nullary_macro355	\strokeint    		# fix or otherwise skip
set#530: nullary_macro331	\frac ab + \scriptscriptstyle{\frac cd + \frac ef} + \frac gh  # missing scriptscriptsytyle fractions 
set#383: nullary_macro184	\intbar	# fix or otherwise skip 



Coverage (Visual): 
\min(x,y), \max(x,y)  # displays as "\min(x,y),\max(x,y)"  should:  "min ( x , y ) , max ( x , y )"
 \gcd(m, n) # displays as "\gcd(m, n)," should be "gcd ( m , n ) ,"
 
 \not\ll \not\gg # display as "⧸≪,⋘,⧸⋘" should be different 
 \not\lll \not\ggg  # same issue 
 \not\equiv
 
 
 b_{f'} # the ' is not displayed 
 {x_2}^3 # rendered version is followed by a ',' 
 
 {}_1^2\!\Omega_3^4 # one and two  are not aligned correctly around the omega 
 
 
 x', y'', f', f'' # derivative not shown correctly "'" missing 
 
 
 
\int\limits_{1}^{3}\frac{e^3/x}{x^2}\, dx # limits is not resolving to integral sign 

 \textstyle \int\limits_{-N}^{N} e^x\, dx # limits is not resolving to integral sign 
 
 \iint\limits_D \, dx\,dy # limits is not resolving to integral sign 
 \iiint\limits_E \, dx\,dy\,dz # limits is not resolving to integral sign 
 \iiiint\limits_F \, dx\,dy\,dz\,dt # limits is not resolving to integral sign 
\oint_{(x,y)\in C} x^3\, dx + 4y^2\, dy # expression x,y ... is not attributed to oint sign 



# no spaces between "ifnisodd/even"
 f(n) =
\begin{cases}
n/2, & \text{if }n\text{ is even} \\
3n+1, & \text{if }n\text{ is odd}
\end{cases}
 
 \Iota \Kappa \Lambda \Mu \Nu \Xi \Pi \Rho  # \Rho renders to pilcrow 
 \mathbb{JKLMNOPQR}  # P renders to pilcrow 
 \mathbf{JKLMNOPQR}  # P renders to pilcrow 
 .. 2-3 equivalent cases 
 
 
 \text{if }n\text{ is even} # lacks spaces 
 \text{if}~n\ \text{is even}  # lacks spaces 
 
 
 {\color{Blue}x^2}+{\color{YellowOrange}2x}-{\color{OliveGreen}1}  # colors are wrong, half of equation is missing 
 
 Color palette # some colors are wrong 
 
 
 
 
 
 
 a\ b  # spacing not resolved correctly -> "a\b " is displayed   
 a\,b  # should here resolve as small space not as ","
 
 
 
 
 # tall parentheses 
 <math>2 = \left(
\frac{\left(3-x\right) \times 2}{3-x}
\right)</math>
 
 
 {}_pF_q(a_1,\dots,a_p;c_1,\dots,c_q;z) # prefix p not rendered correctly (prefixed subsciript)