\
The expression is
.
\
Rationalize the numerator.
\
\
\
Cancel common terms.
\
\
\
\
.
\
\
.
![\"\"](\"/userfiles/image/steps_images/step1.JPG\")
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.![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=60fc90867485272e666bcf433e3496ad.png\")
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.![\"\"](\"/userfiles/image/steps_images/solution.JPG\")
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.