The expression is .
(Apply commutative property of addition: )
(Apply associative property of addition: )
(Add: )
The value of the expression is .
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.![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=b6cfff6180ca84d3a8ed88530d2f7db5.png\")
(Apply commutative property of addition: ![\"\"](\"http://www.mathskey.com/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=04ab48db2a6385513b3391bf07d33cff.png\")
)![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=8b4b39911e7e602595675ab56b8c2722.png\")
(Apply associative property of addition: ![\"\"](\"http://www.mathskey.com/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=63b30614ae855254f4086bd0186079d1.png\")
)![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=ec322f0f8872e90c41459bd0fcce37d1.png\")
(Add: ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=f79672dcf53ef3723bbc9e8afbb26ed7.png\")
)![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=cde633734bc714ba49725a8260950284.png\")
(Add: ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=c8d957ac03e1e6f8624e380b07a66105.png\")
)![\"\"](\"/userfiles/image/steps_images/solution.JPG\")
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.