Prove that for any integer n the number 2n^3 + 3n^2 +7n is divisible by 6 (NT-433A )(2nd method)

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Prove that for any integer n the number 2n^3 + 3n^2 +7n is divisible by 6 (NT-433A )(2nd method)

Prove that for any integer n the number 2n^3 + 3n^2 +7n is divisible by 6 (NT-433A )(2nd method)