The expression is
(Multiply: -25 and -5 = 125) (Product of two equal signs is positive)
The simplified expression is .
![\"\"](\"http://www.mathskey.com/userfiles/image/steps_images/step1.JPG\")
![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=a006524928ba174c12dae7080e2e387c.png\")
![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=dd8ca0ffdaa0ac287825e0c35e8247b8.png\")
(Multiply: -25 and -5 = 125) (Product of two equal signs is positive) ![\"\"](\"http://www.mathskey.com/userfiles/image/steps_images/solution.JPG\")
![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=437fc708651feaf497ef9400ed715e63.png\")
.