KVPY #7

Algebra Level 4

Find the sum of first nine terms of the sum 131\frac{1^{3}}{1} + 13+231+3\frac{1^{3} + 2^{3}}{1+3} + 13+23+331+3+5\frac{1^{3} + 2^{3} + 3^{3}}{1+3+5} .......

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