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Find the sum 1 xx 3 xx 5 + 3 xx 5 xx 7 +...

Find the sum `1 xx 3 xx 5 + 3 xx 5 xx 7 + 5 xx 7 xx 9 + ……. + (2n - 1) ( 2n + 1) ( 2n + 3)`

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The correct Answer is:
`n^(2) ( n +1) ^(2) + ( 8. n ( n +1) ( 2n +1) )/(6) + ( 3. n ( n+1))/( 2)`
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