To install traditional wallpaper around corners, start by hanging the wallpaper on one side of the corner, making sure to line up the pattern correctly. Then, cut the wallpaper at the corner at a 45-degree angle using a sharp knife and a straightedge. Smooth out any bubbles or wrinkles with a wallpaper brush or roller, then repeat the process on the other side of the corner, making sure to line up the pattern with the first piece of wallpaper. Be sure to overlap the wallpaper at the corner to ensure a seamless look.

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