Trouble Including Units in Polynomial and Integral

Hi All,

I'm working on a problem of dissipation of entrapped energy in a steam turbine, for which I would like to calculate the energy and display the result with units. However, when I try to include the units in the terms Mathcad finds some errors. As soon as I strip out the units, Mathcad finds a solution without trouble, please see my worksheet, attached.

Any ideas what the trouble is and if there is a way to include units in the equations? Thanks!