\[ (x-y(x)) y''(x)-h\left (y'(x)\right )=0 \] ✓ Mathematica : cpu = 0.307738 (sec), leaf count = 82
\[\text {Solve}\left [\left \{x=\int \frac {\exp \left (-\int _1^{K[4]}\frac {K[3]-1}{h(K[3])}dK[3]-c_1\right )}{h(K[4])} \, dK[4]+c_2,y(x)=x-\exp \left (-\int _1^{K[4]}\frac {K[3]-1}{h(K[3])}dK[3]-c_1\right )\right \},\{y(x),K[4]\}\right ]\] ✓ Maple : cpu = 0.155 (sec), leaf count = 39
\[y \relax (x ) = x +\RootOf \left (-x +\int _{}^{\textit {\_Z}}\frac {1}{-1+\RootOf \left (\int _{}^{\textit {\_Z}}\frac {\textit {\_a} -1}{h \left (\textit {\_a} \right )}d \textit {\_a} +\ln \left (-\textit {\_g} \right )+c_{1}\right )}d \textit {\_g} +c_{2}\right )\]