Good to know information for students, ecspecially for Phd students.

Example LaTeX

E = mc^2
\[E = mc^2\]

Source LaTeX:

\begin{align}
  a &= b + c \\
  x &= y + z
\end{align}

Display LaTeX:

\[\begin{align} a &= b + c \\ x &= y + z \end{align}\]