Certain elements of the worksheet can be "hidden" from the screen or the printout. These elements include:
Legends, Titles, Window Bars (where the formula and window label are displayed) Window Borders (the bounding lines around each window), and Window Margins (the bounding lines within each window).
Tools > Options > System Preferences > Screen Elements supports individual configuration.
To turn off the window formula, set the Window Bar display to OFF: