Let's simplify the expression step by step:
\[ -4(7b + 3) + 24b - 8 \]
First, distribute the \(-4\) across the parentheses:
\[ -4 \cdot 7b - 4 \cdot 3 + 24b - 8 \]
This gives:
\[ -28b - 12 + 24b - 8 \]
Next, combine the \(b\) terms:
\[ -28b + 24b = -4b \]
Now, combine the constant terms:
\[ -12 - 8 = -20 \]
Putting it all together, we have:
\[ -4b - 20 \]
So, the simplified expression is:
\(-4b - 20\)