"Compute" action is recommended to be used when dealing with sub-problems. For instance, if you are computing the derivative of a product, quotient or compositions of functions (chain rule), you might find "Compute" action very helpful. Please see the screen shot below to see a worked out example. Here "Compute" action is applied to
in the product.
After result is added:
Similarly, "compute" action can be applied to
to complete the derivative of the product.