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The limit is
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Product law of limit :
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..![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=fe0a5283a6940d93365977861d765186.png\")
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.![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=66a1832d706537492df69e162f9f9ced.png\")
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.![\"\"](\"http://www.mathskey.com/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=4e0d57687565341bde620cd7b66d6526.png\")
.