Evaluate
-1040
Factor
-1040
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20-900-40\times 4
Multiply 30 and 30 to get 900.
-880-40\times 4
Subtract 900 from 20 to get -880.
-880-160
Multiply 40 and 4 to get 160.
-1040
Subtract 160 from -880 to get -1040.
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Matrix
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