If \( \log_{e} y = 3\sin^{-1}x \), then \( (1-x^{2})y''-xy' \) at \( x=\dfrac{1}{2} \) is equal to
\( 9e^{\pi/6} \)
\( 9e^{\pi/2} \)
\( 3e^{\pi/6} \)
\( 3e^{\pi/2} \)