Evaluate the integral ${\displaystyle \underset{\phantom{}}{\overset{\phantom{}}{}}}\frac{1}{1-121x^2}dx.$ Assume $x$ is in the domain $(-,-1)(1,),$ and be sure to include the argument of the trigonometric function in parentheses in your answer.

Provide your answer below:

${\displaystyle \underset{\phantom{}}{\overset{\phantom{}}{}}}\frac{1}{1-121x^2}dx=$

$$