It seems that there are some missing brackets in the expression, and it's a bit unclear as written. I'll interpret it as:

\[
1 - \left( \frac{30}{7 + 3(-4)} \right)3
\]

Let me walk through the steps to solve this:

1. First, solve the expression inside the parentheses:
   \[
   7 + 3(-4) = 7 - 12 = -5
   \]

2. Now, substitute \(-5\) into the fraction:
   \[
   \frac{30}{-5} = -6
   \]

3. Next, multiply the result by 3:
   \[
   -6 \times 3 = -18
   \]

4. Finally, subtract from 1:
   \[
   1 - (-18) = 1 + 18 = 19
   \]

So, the result is:

\[
\boxed{19}
\]

Would you like further details or have any questions?

Here are some related questions you might find interesting:
1. How do you handle expressions with more complex nested parentheses?
2. What happens if you divide by zero in such expressions?
3. How do you apply the order of operations (PEMDAS) to complicated expressions?
4. Can you explain how to simplify expressions involving negative numbers?
5. How does one handle fractional results in expressions like

Learn how to solve the expression 1 - (30 ÷ (7 + 3(-4))) × 3 step-by-step by applying the order of operations (PEMDAS). This problem covers division, parentheses, and handling negative numbers. Suitable for students in Grades 7-9.

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