The expression is .
(Write prime factorization of 25)
(Definition of negative exponent)
The solution is .
![\"\"](\"http://www.mathskey.com/userfiles/image/steps_images/step1.JPG\")
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.![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=3df140d0d1c11001ff56aa998ab4e45f.png\")
(Write prime factorization of 25)![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=6f9d0e315851d0bfbcf324f251eb5993.png\")
(Definition of negative exponent)![\"\"](\"http://www.mathskey.com/userfiles/image/steps_images/solution.JPG\")
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.