Need help with inverse laplace

Im supposed to verify through MATLAB that the inverse laplace of Figure 3.35 is Figure 3.39

but I know this:

syms s tp T
X_a=((1/s)-(1/(s+(1/tp))))*exp(-T*s)
x_a=ilaplace(X_a)

is wrong. Can someone please help with this?

Answer 1

[Walter Roberson]

syms s tp T
assume(T>=0)          %THIS
X_a=((1/s)-(1/(s+(1/tp))))*exp(-T*s)

X_a = 

x_a=ilaplace(X_a)

x_a =