In the Jetpack plugin, the subscriptions module can be included in your blog by following these instructions:
To use the Subscriptions widget, go to Appearance → Widgets. Drag the widget labeled “Blog Subscriptions (Jetpack)” into one of your sidebars and configure away.
I am interested in including the subscriptions form on a Page within my site, in the main section of the page. Is there some sort of shortcode or other way that I can easily include the subscriptions form within my page content? Or to do this, would I need to define a new sidebar, put the subscriptions widget in the sidebar, and them make a custom template that includes this new sidebar within this page (quite a cumbersome exercise)?