The expression is
Line up the decimal points and subtract the corresponding columns.
(Subtract: )
The difference is
![\"\"](\"/userfiles/image/steps_images/step1.JPG\")
![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=8a53ca37c8f4eb13b1e8741a4e9a5c05.png\")
![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=e0e3ff7d1262b964017d9ed1727866f0.png\")
(Subtract: ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=53893689080e3456545d55fa8023746c.png\")
) ![\"\"](\"/userfiles/image/steps_images/solution.JPG\")
![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=83fec0894ec0336dd8e20b6013730eaa.png\")