It seems like your expression is incomplete or formatted incorrectly. Here's what I interpret from it:

• $E \left( \frac{-1}{2} \times 1 \right)$

This simplifies as follows:

• $\frac{-1}{2} \times 1 = \frac{-1}{2}$

So the expression simplifies to:

$E \left( \frac{-1}{2} \right)$

However, the function $E(x)$ is unclear. If you meant the exponential function $e^x$, then the expression becomes:

$e^{\frac{-1}{2}} = \frac{1}{\sqrt{e}} \approx 0.6065$

If you meant something else with $E(x)$, such as an expectation operator (common in probability), please provide more context, and I'll adjust the interpretation.

Would you like more details or have any questions about this? Here are some related questions:

1. How do you evaluate exponential functions like $e^x$?
2. What is the value of $e^{1/2}$?
3. How is the expectation operator used in probability theory?
4. What are some common mathematical operations involving the exponential function $e$?
5. Can you solve more complex expressions involving $e$?

Tip: When using the exponential function $e^x$, remember that $e \approx 2.718$ is an important constant, and $e^{\frac{1}{2}}$ is the square root of $e$.