The expression is .
(Multiply: )
(Substitute the imaginary unit value of )
(Product of two same signs is positive)
The simplified expression is 12.
![\"\"](\"/userfiles/image/steps_images/step1.JPG\")
![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=7e31847e21ffbe5a80ea8b99913d5838.png\")
.![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=08f7b6b4d3fe0c2836aa800839f9cc4f.png\")
(Multiply: ![\"6](\"http://www.wiris.com/demo-aspx/pluginwiris3/fckeditor_wiris/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.aspx?formula=a552286328e15e45a1bcc8f3e0392e7a.png\")
)![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=c014c5f7c0d581738eee11439eeff46b.png\")
(Substitute the imaginary unit value of ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=cf3bd74905ce72ea9a2eca4c6e8b84a0.png\")
)![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=497e3ca02116d7188ea6669c409c5a4b.png\")
(Product of two same signs is positive)![\"\"](\"/userfiles/image/steps_images/solution.JPG\")