The expression $-11 - 13$ can be simplified by performing the subtraction:

$-11 - 13 = -24$

So, the result is $-24$.

Would you like more details or have any questions? Here are some related questions you might find interesting:

1. What is the result of $-15 - 20$?
2. How would you solve $-8 - 5$?
3. What happens if you subtract a negative number from another negative number?
4. How do you add two negative numbers together?
5. What is the difference between $-30$ and $10$?

Tip: When subtracting two negative numbers, think of it as moving further left on the number line. The result is always more negative.