\[ (x-3) y''(x)-(4 x-9) y'(x)+(3 x-6) y(x)=0 \] ✓ Mathematica : cpu = 0.0399875 (sec), leaf count = 42
\[\left \{\left \{y(x)\to \frac {1}{8} c_2 e^{3 x-9} \left (4 x^3-42 x^2+150 x-183\right )+c_1 e^{x-3}\right \}\right \}\] ✓ Maple : cpu = 0.048 (sec), leaf count = 30
\[ \left \{ y \left ( x \right ) ={{\rm e}^{x}}{\it \_C1}+{\it \_C2}\,{{\rm e}^{3\,x}} \left ( 4\,{x}^{3}-42\,{x}^{2}+150\,x-183 \right ) \right \} \]