Evaluate
-59
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-59
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1+21+23-4-100
Subtract 1 from 2 to get 1.
22+23-4-100
Add 1 and 21 to get 22.
45-4-100
Add 22 and 23 to get 45.
41-100
Subtract 4 from 45 to get 41.
-59
Subtract 100 from 41 to get -59.
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