Evaluate
-15
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-15
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1-\left(5+3+2\right)-\left(7+1-2\right)
Subtract 2 from 3 to get 1.
1-\left(8+2\right)-\left(7+1-2\right)
Add 5 and 3 to get 8.
1-10-\left(7+1-2\right)
Add 8 and 2 to get 10.
-9-\left(7+1-2\right)
Subtract 10 from 1 to get -9.
-9-\left(8-2\right)
Add 7 and 1 to get 8.
-9-6
Subtract 2 from 8 to get 6.
-15
Subtract 6 from -9 to get -15.
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