The expression is .
Add the polynomials vertically.
(Arrange like terms in columns and combine them)
The sum of polynomials is .
![\"\"](\"http://www.mathskey.com/userfiles/image/steps_images/step1.JPG\")
![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=697e0b9aff13be5ebc2e42d2b20f2641.png\")
.![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=618f842eaba0162c9892efc7de3cd00b.png\")
(Arrange like terms in columns and combine them)![\"\"](\"http://www.mathskey.com/userfiles/image/steps_images/solution.JPG\")
![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=12b86d6460b17ecdb7639c1865455416.png\")
.