Find the Indefinite Integral $\int \frac { x ^ { 2 } - 25 } { x ^ { 2 } + 25 } d x$

Find the indefinite integral $\int \frac { x ^ { 2 } - 25 } { x ^ { 2 } + 25 } d x$ .

A) $\frac { x ^ { 3 } - 25 x } { x ^ { 3 } + 25 x } + C$
B) $x - 10 \arctan \left( \frac { x } { 5 } \right) + C$
C) $x - 6 \arctan \left( \frac { x } { 5 } \right) + C$
D) $\frac { x ^ { 3 } - 75 x } { x ^ { 3 } + 75 x } + C$

Correct Answer:

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