The expression is
Additive inverse of 1 is – 1. To subtract 1, add the additive inverse of 1.
(Simplify: )
The difference is – 4.
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(Simplify: ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=1273e76fa51bf5853514eef54c3d9d2b.png\")
)![\"\"](\"/userfiles/image/steps_images/solution.JPG\")