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The \$ syntax: ${}_{{abc}}D$ inline TeX style Tex style
The \( )\ syntax: \({}_{{abc}}D)\ inline style does not work Latex style (?)
The \$$ syntax
$$
\begin{aligned}
{}_n{a_x} &= \frac{n}{2} – \frac{{n*n}}{{12}}*\left( {{}_n{m_x} – {}_n{k_x}} \right); \\
{}_n{k_x} &= \frac{1}{{2*n}}Ln\left( {\frac{{{}_n{m_{x + n}}}}{{{}_n{m_{x – n}}}}} \right) \\
\end{aligned}
$$
