How is it possible to evaluate complex formulas like

```
\binom{2^{4}-3}{2^3}

```

with

```
\pgfmathtruncatemacro

```

? I want this to evaluate to 1287.

What already works:

```
\begin{tikzpicture} 
\foreach  \l  in {2,4,8} {
\pgfmathtruncatemacro{\jn}{(2^\l)*\l}
\node[] at (\l,0) {$\jn$};
}
\end{tikzpicture}

```

Evaluates to 8, 64 and 2048

EDIT: An alternative would suit me as well.