\[ \begin{array}{l} \frac{2^{3}-1^{3}}{1 \times 7}+\frac{4^{3}-3^{3}+2^{3}-1^{3}}{2 \times 11}\end{array} \]

Question

\[ \begin{array}{l} \frac{2^{3}-1^{3}}{1 \times 7}+\frac{4^{3}-3^{3}+2^{3}-1^{3}}{2 \times 11}+ \\ \frac{6^{3}-5^{3}+4^{3}-3^{3}+2^{3}-1^{3}}{3 \times 15}+\ldots+ \\ \frac{30^{3}-29^{3}+28^{3}-27^{3}+\ldots .+2^{3}-1^{3}}{15 \times 63} \end{array} \] is equal to

Answer 1

Here is your solution: