9-3+(15+5-(20+18-16)+2+3-(14-6)=
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6+15+5-\left(20+18-16\right)+2+3-\left(14-6\right)
Subtract 3 from 9 to get 6.
6+20-\left(20+18-16\right)+2+3-\left(14-6\right)
Add 15 and 5 to get 20.
6+20-\left(38-16\right)+2+3-\left(14-6\right)
Add 20 and 18 to get 38.
6+20-22+2+3-\left(14-6\right)
Subtract 16 from 38 to get 22.
6+-2+2+3-\left(14-6\right)
Subtract 22 from 20 to get -2.
6+3-\left(14-6\right)
Add -2 and 2 to get 0.
6+3-8
Subtract 6 from 14 to get 8.
6-5
Subtract 8 from 3 to get -5.
1
Subtract 5 from 6 to get 1.
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