To solve this expression, we need to follow the order of operations (PEMDAS/BODMAS).

First, we simplify the parentheses:
-39 + 27 = -12
61 - 79 = -18

Now, we can substitute these values back into the expression:
127 - (-12) + (-18)

Next, we simplify the double negative:
127 + 12 + (-18)

Finally, we add the numbers together:
127 + 12 - 18 = 121

Therefore, the answer is 121.