As in title I am really bothered with result in floating number obtained from laplace(expr, t, s).
I have a target to laplace and the laplace() gives me result with floating numbers.
(ex. laplace(diff(diff(f(t),t), t), t, s) = laplace(s^2. * laplace(f(t), t, s) : the period after 2 is annoying)
How can I avoid or do some conversions to kill the periods?