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ODE: Damped vibrations
ID:  26e8b8e15b869cfcc410f04e8ac3e283
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xd0 = x1
xd1 = -2.0*x1-3.0*x0
x0(t) = exp(-t)*(((c1+c0)/sqrt(2.0))*sin(sqrt(2.0)*t)+c0*cos(sqrt(2.0)*t))
x1(t) = exp(-t)*(-1.0*((c1+3.0*c0)/sqrt(2.0))*sin(sqrt(2.0)*t)+c1*cos(sqrt(2.0)*t))
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IVP: 45
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x0 = 0.0
x1 = -1.0
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IVP: 115
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x0 = [0.0,0.1]
x1 = [-1.05,-0.9]