Lots of weird HTMLs!!

e.g.
```yaml
eng:
id: 1030111
terms:
- type: expression
normativeStatus: preferred
designation: system of orthogonal functions
- type: expression
designation: orthogonal system
definition: set of functions, such that each of them is orthogonal to any other
language_code: eng
notes:
- "Examples: \n\n

\n\n
• Legendre polynomials P constitute a system of orthogonal
  functions on the interval $$- 1 ,   + 1$$ because $$∫_(   - 1)^(   + 1) P_k
  \ ( x ) P_l ( x ) dx = 0$$ for any integers $$k != l$$.
\n\n
• Laguerre
  polynomials L constitute a system of orthogonal functions on the interval $$0
  ,   + oo$$ with the weight $$exp ( - x )$$ because $$∫_(  0)^(   + oo ) L_k
  \ ( x ) L_l ( x ) exp ( - x ) dx = 0$$ for any integers $$k != l$$.
\n\n
• Trigonometric
  functions sine and cosine constitute a system of orthogonal functions on the
  interval $$0 ,  2 \\pi$$ because $$∫_(  0)^(  2 \\pi ) sin ( kx ) sin ( lx
  ) dx = 0$$ and $$∫_(  0)^(  2 \\pi ) cos ( kx ) cos ( lx ) dx = 0$$ for any
  integers $$k != l$$, and $$∫_(  0)^(  2 \\pi ) sin ( kx ) cos ( lx ) dx = 0$$
  for any integer $$\x01$$ and $$\x01$$.