how to remove electic windows

A question usually has a question mark at the end of the sentence What is it precisely you're trying to do and what is it you want to achieve?

the electric motor has gone window is stuck open and cant close is it easy to change and how expensive is it to do

You can't be certain that the motor is dead without properly testing it. it's actually a lot more likely to be a wiring or switch fault. Start by checking the fuse, then the big wiring connector that runs into the inside front edge of the door. Make sure all the connections are clean and free of corrosion.

If that fails then have the switch tested. Maybe buy a cheap replacement from a scrappy for a few quid to see if that works.

Eliminate the easy stuff before starting on the harder jobs

See here