\[ \left \{t x'(t)=2 x(t)-t,t^3 y'(t)=t^2 y(t)-x(t)+t,t^4 z'(t)=t^3 z(t)-t^2 y(t)-x(t)+t\right \} \] ✓ Mathematica : cpu = 0.0087237 (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 = 0.133 (sec), leaf count = 37
\[\left \{\left \{x \left (t \right ) = c_{3} t^{2}+t, y \left (t \right ) = c_{2} t +c_{3}, z \left (t \right ) = \frac {c_{1} t^{2}+c_{2} t +c_{3}}{t}\right \}\right \}\]