\[ \left \{t x'(t)=2 x(t)-t,t^3 y'(t)=t^2 y(t)-x(t)+t,t^4 z'(t)=t^3 z(t)-t^2 y(t)-x(t)+t\right \} \] ✓ Mathematica : cpu = 0.0074979 (sec), leaf count = 39
\[\left \{\left \{x(t)\to t+c_3 t^2,y(t)\to c_2 t+c_3,z(t)\to c_1 t+\frac {c_3}{t}+c_2\right \}\right \}\] ✓ Maple : cpu = 0.107 (sec), leaf count = 37
\[\left \{x \relax (t ) = t^{2} c_{3}+t, y \relax (t ) = t c_{2}+c_{3}, z \relax (t ) = \frac {t^{2} c_{1}+t c_{2}+c_{3}}{t}\right \}\]