Question: Inverse laplace transform

Hi there,

I was asked to compute the inverse laplace transform of 
1/s^2 + (e^s - 2)/(s*(e^s-1))

I've tried to evaluate it using online calculators like wolframalpha.However,none of them was able to give an answer.

So,this is what I've got from Maple:


I was wondering if it is correct.The graph doesn't look too bad but I've no idea what 1+frac(t) means.Some help would be greatly appreciated,thanks!

p.s.I've loaded the with(inttrans) package

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