Alonso is correct answer.
Since Aida is take out the equation right side is only with out take addition of .
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with out take addition of ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=7e5fe56ccc89eb14ac6a317028e0dcdc.png\")
.![\"\"](\"http://www.mathskey.com/userfiles/image/steps_images/solution.JPG\")