\[ 4 y''(x)+9 x y(x)=0 \] ✓ Mathematica : cpu = 0.0050847 (sec), leaf count = 42
\[\left \{\left \{y(x)\to c_1 \text {Ai}\left (\sqrt [3]{-1} \left (\frac {3}{2}\right )^{2/3} x\right )+c_2 \text {Bi}\left (\sqrt [3]{-1} \left (\frac {3}{2}\right )^{2/3} x\right )\right \}\right \}\] ✓ Maple : cpu = 0.023 (sec), leaf count = 29
\[ \left \{ y \left ( x \right ) ={\it \_C1}\,{{\rm Ai}\left (-{\frac {{3}^{{\frac {2}{3}}}\sqrt [3]{2}x}{2}}\right )}+{\it \_C2}\,{{\rm Bi}\left (-{\frac {{3}^{{\frac {2}{3}}}\sqrt [3]{2}x}{2}}\right )} \right \} \]