What is negative one over two times four

$$\begin{array}{l}
\frac{-1}{-2}\times4\\\\
\frac{-1}{-2}\times\frac{4}{1}\\\\
\frac{-1\times4}{-2\times1}\\\\
\frac{-4}{-2}\\\\
\frac{+4}{+2}\\\\
\frac{4}{2}\\\\
\frac{2}{1}\\\\
2
\end{array}$$

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