What is the sum of the following sequence:
Σ(2k-1)^3 for k=1...n
for different n?
Additional test cases have been added.
surface of a spherical planet
Sum of diagonal of a square matrix
Find the area of the four walls
Find Out sum of principal diagonal element of given matrix
Find the product of a Vector
Sum of series IV
Sum of series V
Sum of series VI
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