8-\left[\left(-4\right)+\left(-9\right)\right]-\left[\left(-2\right)-\left(-8\right)-\left(-9\right)\right]
Starting from the innermost parentheses and working outward:
$8-\left[\left(-4\right)+\left(-9\right)\right]-\left[\left(-2\right)-\left(-8\right)-\left(-9\right)\right]$
$8-\left[-13\right]-\left[\left(-2\right)+8+9\right]$
$8+13-\left(2+8+9\right)$
$21-19$
$2$
Thus, $8-\left[\left(-4\right)+\left(-9\right)\right]-\left[\left(-2\right)-\left(-8\right)-\left(-9\right)\right] = \boxed{2}$.
what a horrible, unreadable mish-mash!
I apologize for any confusion caused by the formatting of the previous solution. Here is a neater version:
Starting from the innermost parentheses and working outward:
$8-\left[\left(-4\right)+\left(-9\right)\right]-\left[\left(-2\right)-\left(-8\right)-\left(-9\right)\right]$
$8-\left[-13\right]-\left[\left(-2\right)+8+9\right]$
$8+13-\left(2+8+9\right)$
$21-19$
$2$
Thus, $8-\left[\left(-4\right)+\left(-9\right)\right]-\left[\left(-2\right)-\left(-8\right)-\left(-9\right)\right] = \boxed{2}$.
oh, yeah -- much better.
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NOT!