The sum of 1x+y1x+y and 1x−y1x−y is?

• A. 2yx2−y22yx2−y22yx2−y22yx2−y22yx2−y22yx2−y22yx2−y22yx2−y22yx2−y22yx2−y22y2y2y2yx2−y2x2−y2x2−y2x2x2x2x2xx22−y2y2y2y2yy222yx2−y2
• B. 2xx2−y22xx2−y22xx2−y22xx2−y22xx2−y22xx2−y22xx2−y22xx2−y22xx2−y22xx2−y22x2x2x2xx2−y2x2−y2x2−y2x2x2x2x2xx22−y2y2y2y2yy222xx2−y2
• C. −2yx2−y2−2yx2−y2−2yx2−y2−2yx2−y2−2yx2−y2−2yx2−y2−2yx2−y2−2yx2−y2−2yx2−y2−2yx2−y2−2y−2y−2y−2yx2−y2x2−y2x2−y2x2x2x2x2xx22−y2y2y2y2yy22−2yx2−y2
• D. 2xy2−x22xy2−x22xy2−x22xy2−x22xy2−x22xy2−x22xy2−x22xy2−x22xy2−x22xy2−x22x2x2x2xy2−x2y2−x2y2−x2y2y2y2y2yy22−x2x2x2x2xx222xy2−x2