Evaluate
2139
Factor
3\times 23\times 31
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690+345+1035+69
Add 345 and 345 to get 690.
1035+1035+69
Add 690 and 345 to get 1035.
2070+69
Add 1035 and 1035 to get 2070.
2139
Add 2070 and 69 to get 2139.
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