Partial fractions right?

Or just ask Mathematica:

. . . what, I ain't proud.Code:In[13]:= LaplaceTransform[InverseLaplaceTransform[ (s^3 + s^2 - 26*s + 4)/((s^2 + 4)* (s^2 + 9)), s, t], t, s] Out[13]= (1/3)*(-((18*s)/(4 + s^2)) + 3/(9 + s^2) + (21*s)/(9 + s^2))