We know $f(x)$ is a differentiable function. We are given its first derivative as:

$f^{\text{'}}(x)=\frac{6e^{6x}}{1+e^{12x}}$

Which of the following might be the formula for $f(x)?$

$f(x)=arctan(e^{6x})$

$f(x)=e^{6x}arctan(x)$

$f(x)=arctan(6e^{6x})$

$f(x)=arcsec(e^{6x})$

$f(x)=arcsin(e^{6x})$