Escapes and references

\*a\* 10\ km © — �
.
<p>*a* 10 km © — �</p>

a & b, a@b, x.y
.
<p>a &amp; b, a@b, x.y</p>

 Ÿ  A
.
<p>� � � A</p>

� and &#65 and \
.
<p>&amp;#12345678; and &amp;#65 and \</p>