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## Homework Statement

The problem is not getting the answer to the laplace transform but instead reducing my answer so i dnt lose marks.

If i work out the laplace transform of:

L(t^3 * sinh(4t)) to be

3!/(2(s- 4)^4)- 3!/(s(s+ 4)^4) then how do i add these to get a single fraction? Its doing my head in

## The Attempt at a Solution

I know something has to be multiplied but i have no idea what it is...

Thanks in advance!