Let's simplify the expression step by step:
-9 * 2 - (3 - 6) / 1 - (-2 + 1) - (-3)
First, perform the operations inside parentheses:
-9 * 2 - (-3) / 1 - (-2 + 1) - (-3)
Now, simplify further:
-18 - (-3) / 1 - (-2 + 1) - (-3)
Next, subtract the negative values:
-18 + 3 / 1 - (-2 + 1) + 3
Now, perform the division:
-18 + 3 - (-2 + 1) + 3
Simplify further:
-15 - (-1) + 3
Now, subtract the negative value:
-15 + 1 + 3
Finally, perform the remaining additions:
-14 + 3 = -11
So, the simplified expression is equal to -11.