How do I represent this sym function as a written formula

My code is the following:

clc

clear all

close all

syms s

f = ilaplace(1/((s+7)*(s^3+4*s^2+6*s+5)));

The f that I obtain is the follwing:

symsum((exp(t*root(z^3 + 4*z^2 + 6*z + 5, z, k))*root(z^3 + 4*z^2 + 6*z + 5, z, k)^2)/(3*root(z^3 + 4*z^2 + 6*z + 5, z, k)^2 + 8*root(z^3 + 4*z^2 + 6*z + 5, z, k) + 6), k, 1, 3)/184 - (3*symsum((exp(root(z^3 + 4*z^2 + 6*z + 5, z, k)*t)*root(z^3 + 4*z^2 + 6*z + 5, z, k))/(8*root(z^3 + 4*z^2 + 6*z + 5, z, k) + 3*root(z^3 + 4*z^2 + 6*z + 5, z, k)^2 + 6), k, 1, 3))/184 - exp(-7*t)/184 + (27*symsum(exp(t*root(z^3 + 4*z^2 + 6*z + 5, z, k))/(3*root(z^3 + 4*z^2 + 6*z + 5, z, k)^2 + 8*root(z^3 + 4*z^2 + 6*z + 5, z, k) + 6), k, 1, 3))/184

How can I see it as a normal written formula?

Thanks in advance.

Answer 1

[Torsten]

syms s
f = vpa(ilaplace(1/((s+7)*(s^3+4*s^2+6*s+5))),4)

f =