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{x′(t)=4x(t),y′(t)=x(t)−2y(t),z′(t)=x(t)−4y(t)+z(t)} ✓ Mathematica : cpu = 0.0102984 (sec), leaf count = 88
{{x(t)→c1e4t,y(t)→16e−2t(c1(e6t−1)+6c2),z(t)→19e−2t(c1(e3t+e6t−2)−12c2(e3t−1)+9c3e3t)}}
✓ Maple : cpu = 0.084 (sec), leaf count = 50
{{x(t)=_C3e4t,y(t)=_C3e4t6+e−2t_C2,z(t)=_C3e4t9+_C1et+4e−2t_C23}}
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