\[ x^2 y'(x)+y(x)-x=0 \] ✓ Mathematica : cpu = 0.0082283 (sec), leaf count = 27
\[\left \{\left \{y(x)\to -e^{\frac {1}{x}} \text {Ei}\left (-\frac {1}{x}\right )+c_1 e^{\frac {1}{x}}\right \}\right \}\] ✓ Maple : cpu = 0.009 (sec), leaf count = 16
\[ \left \{ y \left ( x \right ) = \left ( {\it Ei} \left ( 1,{x}^{-1} \right ) +{\it \_C1} \right ) {{\rm e}^{{x}^{-1}}} \right \} \]