\[ (a+b+x) y'(x)+a y(x)+x y''(x)=0 \] ✓ Mathematica : cpu = 0.0243341 (sec), leaf count = 37
\[\left \{\left \{y(x)\to c_1 e^{-x} U(b,a+b,x)+c_2 e^{-x} L_{-b}^{a+b-1}(x)\right \}\right \}\] ✓ Maple : cpu = 0.073 (sec), leaf count = 26
\[y \relax (x ) = {\mathrm e}^{-x} \left (\KummerU \left (b , a +b , x\right ) c_{2}+\KummerM \left (b , a +b , x\right ) c_{1}\right )\]