latex formula space code example

Example 1: latex itemize spacing

\begin{itemize}
  \setlength\itemsep{1em}
  \item one
  \item two
  \item three
\end{itemize}

Example 2: give space in latex

Horizontal \hspace{1cm} spaces can be inserted manually. Useful 
to control the fine-tuning in the layout of pictures.

Left Side \hfill Right Side

Example 3: space latex math

Spaces in mathematical mode.

\begin{align*}
f(x) &= x^2\! +3x\! +2 \\
f(x) &= x^2+3x+2 \\
f(x) &= x^2\, +3x\, +2 \\
f(x) &= x^2\: +3x\: +2 \\
f(x) &= x^2\; +3x\; +2 \\
f(x) &= x^2\ +3x\ +2 \\
f(x) &= x^2\quad +3x\quad +2 \\
f(x) &= x^2\qquad +3x\qquad +2
\end{align*}