Question 30
If $a,$ $b,$ $c,$ $d$ are the solutions of the equation $x^4-bx-3=0,$ then an equation whose solutions are $$
\begin{gathered} \frac{a+b+c}{d^2},\quad \frac{a+b+d}{c^2},\\ \frac{a+c+d}{b^2},\quad \frac{b+c+d}{a^2} \end{gathered}
$$ is
\begin{gathered} \frac{a+b+c}{d^2},\quad \frac{a+b+d}{c^2},\\ \frac{a+c+d}{b^2},\quad \frac{b+c+d}{a^2} \end{gathered}
$$ is