The sum \(1 + \frac{{{1^3} + {2^3}}}{{1 + 2}} + \frac{{{1^3} + {2^3} + {3^3}}}{{1 + 2 + 3}} + \ldots + \frac{{{1^3} + {2^3} + {3^3} + \ldots + {{15}^3}}}{{1 + 2 + 3 + \ldots + 15}} - \frac{1}{2}\left( {1 + 2 + 3 + \ldots + 15} \right)\) is equal to:

The sum \(1 + \frac{{{1^3} + {2^3}}}{{1 + 2}} + \frac{{{1^3} + {2^3} +

1.	The sum \(1 + \frac{{{1^3} + {2^3}}}{{1 + 2}} + \frac{{{1^3} + {2^3} + {3^3}}}{{1 + 2 + 3}} + \ldots + \frac{{{1^3} + {2^3} + {3^3} + \ldots + {{15}^3}}}{{1 + 2 + 3 + \ldots + 15}} - \frac{1}{2}\left( {1 + 2 + 3 + \ldots + 15} \right)\) is equal to:
A.	620
B.	1240
C.	1860
D.	660
Answer» B. 1240