Go to SharePoint Page and click onEDIT. Once in Edit mode, click on the INSERT tab and add a Web Part.
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Under Categories, choose Media and Content.
Under Parts, choose Content Editor.
Click on the Add button.
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Go to the Content that was added and click on the down arrow to open the pop-up window. Click on Edit Web Part.
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Click on Click here to add new content
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Type in your code then click on OK on lower-right part of window.
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Save
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