![\"\"](\"http://www.mathskey.com/userfiles/image/steps_images/step1.JPG\")
Order of Operations:
\To simplify the expression follow the order of operations: (PEMDAS)
\1. Evaluate the expressions inside the Parenthesis/Brackets (P).
\2. Evaluate Powers/Exponents (E).
\3. Multiply and/or Divide in order from left to right (MD).
\4. Add and/or Subtract in order from left to right (AS).
\A simple technique for remembering the order of operations is turned into phrase "Please Excuse My Dear Aunty Sally"
\
The expression is ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=4704ab4a627b6785661645521a9195c2.png\")
![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=f902868a7fdb5acba046d07318422af5.png\")
(Replace x with 7 and y with 3 in original expression)
![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=43a3fab40c2b9e7251b4e781ceed77ae.png\")
(Rewrite the expression as division problem)
![\"\"](\"http://www.mathskey.com/userfiles/image/steps_images/step2.JPG\")
First evaluate the expression within the parenthesis.
\![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=5fc12f31b8ab60c2b1c82aafe2a0b0a5.png\")
(Multiply: ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=d7ee9b60a320fcf567adb1fae40264d6.png\")
)
Next operation is division.
\ ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=f56833abdcb324673dc919ea5bd48b49.png\")
(Divide: ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=1215997869b954c29c8fa82f829fc235.png\")
)![\"\"](\"http://www.mathskey.com/userfiles/image/steps_images/solution.JPG\")
The value of the expression is 21.