
$l2h_cache_key = q/$$\partial_t \eta (t) = g(\eta(t),\varphi(t))$$ ''/;
$l2h_cache{$l2h_cache_key} = q|<DIV CLASS="displaymath">
<!-- MATH
 \begin{displaymath}
\partial_t \eta (t) = g(\eta(t),\varphi(t))
\end{displaymath}
 -->

<IMG
 STYLE="height: 2.55ex; vertical-align: -0.70ex; " SRC="sing_1.svg"
 ALT="$\displaystyle \partial_t \eta (t) = g(\eta(t),\varphi(t))$">
</DIV>
 &rdquo;|;

$l2h_cache_key = q/$$disp--laymath
f(x) = {1 \over \sigma \sqrt{2\pi}}e@sup{-{1 \over 2}\left({x-\mu \over \sigma}\right)^2}
$$/;
$l2h_cache{$l2h_cache_key} = q|<DIV CLASS="displaymath">
<!-- MATH
 \begin{displaymath}
disp- -laymath
f(x) = {1 \over \sigma \sqrt{2\pi}}e@sup{-{1 \over 2}\left({x-\mu \over \sigma}\right)^2}
\end{displaymath}
 -->

<IMG
 STYLE="height: 6.26ex; vertical-align: -2.32ex; " SRC="sing_4.svg"
 ALT="$\displaystyle disp--laymath
f(x) = {1 \over \sigma \sqrt{2\pi}}e@sup{-{1 \over 2}\left({x-\mu \over \sigma}\right)^2}
$">
</DIV>
|;

$l2h_cache_key = q/$--a {\frac{1}{2}} @minus{}$/;
$l2h_cache{$l2h_cache_key} = q|<!-- MATH
 $- -a {\frac{1}{2}} @minus{}$
 -->
<SPAN CLASS="MATH"><IMG
 STYLE="height: 2.98ex; vertical-align: -0.92ex; " SRC="sing_2.svg"
 ALT="$--a {\frac{1}{2}} @minus{}$"></SPAN>|;

$l2h_cache_key = q/$--a@minus{} {\frac{1}{2}}$/;
$l2h_cache{$l2h_cache_key} = q|<!-- MATH
 $- -a@minus{} {\frac{1}{2}}$
 -->
<SPAN CLASS="MATH"><IMG
 STYLE="height: 2.98ex; vertical-align: -0.92ex; " SRC="sing_3.svg"
 ALT="$--a@minus{} {\frac{1}{2}}$"></SPAN>|;
1;