LaTeX/itex Tests
================

Test unnumbered display mode equation:
$$ y = mx + b $$

Test unnumbered display mode equation on multiple lines:
$$
  y = mx + b
$$

Test numbered display mode equation:
\[ y = mx + b \]

Test numbered display mode equation on multiple lines:
\[
      \label{test}
      y = \psi(mx + b)
\]