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{ax′(t)+by′(t)=αx(t)+βy(t),bx′(t)−ay′(t)=βx(t)−αy(t)} ✓ Mathematica : cpu = 0.0116781 (sec), leaf count = 183
{{x(t)→c2et(aα+bβ)a2+b2sin(t(aβ−αb)a2+b2)+c1et(aα+bβ)a2+b2cos(t(aβ−αb)a2+b2),y(t)→c2et(aα+bβ)a2+b2cos(t(aβ−αb)a2+b2)−c1et(aα+bβ)a2+b2sin(t(aβ−αb)a2+b2)}}
✓ Maple : cpu = 0.102 (sec), leaf count = 144
{{x(t)=_C1e(iaβ−iαb+aα+bβ)ta2+b2+_C2e−(iaβ−iαb−aα−bβ)ta2+b2,y(t)=i(_C1e(iaβ−iαb+aα+bβ)ta2+b2−_C2e−(iaβ−iαb−aα−bβ)ta2+b2)}}
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