Obtain a Laplace Transform using Laplace Expansion Properties

My problem deals with the Laplace expansion property applied to a cosine function. I am unsure as to how the problem should be solved based on the given property formula and the Differential Equation books that I have used have been of no help. If familiar, please try to use the DiPrima notation.

Problems using Laplace expansion property to find Laplace Transform.

My problem deals with the Laplace expansion property applied to a exponential product function. I am unsure as to how the problem should be solved based on the given property formula and the Differential Equation books that I have used have been of no help. If familiar, please try to use the DiPrima notation.

Inverse Laplace Transforms and partial fractions

I have a transform F(s) of which I need the inverse transform for. The form of the transform is not of a common form and I am having trouble reducing it to a workable form.

Example using Laplace transform to solve an I.V.P. (Specific Example within)

How would the Laplace transform be used to solve IVP? Specific Example within attachment.

General Real-Valued Solutions

Find the general real-valued solution of each system. Classify the origin as a saddle, center, spiral, or one of the normal types (identify the type). Identify as neutrally stable, unstable, or asymptotically stable. *See attachment for systems