1.

Evaluate:(997)3

Answer»

= (1000 - 3)3 

= (1000)3 - (3)3 - 3 × 1000 × 3 × (1000 - 3) 

= 1000000000 - 27 - 9000 × (1000 - 3) 

= 1000000000 - 27 - 900000 + 27000 

= 991026973



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