If you don't have installed program for editing PDF documents on your computer, then you can use web application PDFescape which allows you to edit your documents in your browser.
By default Windows calculator doesn't support order of operation, to enable the functionality you need to activate the scientific view, let me show you how.
From the Photos app you can email only up to five photos at once. Let me show you a nice little trick which will let you send more than five images in a single email.
240 million around the globe speak Portuguese, find out if you know the basics of the 6th most spoken language in the world and build up your Dreevoo knowledge profile.