HP 35s HP 35s scientific calculator - User Guide - Page 109

To display equations: 1. Press . This activates Equation mode and turns on the EQN annunciator. The display shows an entry from the equation list: if the equation pointer is at the top of the list. The current equation (the last equation you viewed). 2. Press × or Ø to step through the equation list and view each equation. The list "wraps around" at the top and bottom marks the "top" of the list. To view a long equation: 1. Display the equation in the equation list, as described above. If it's more than 14 characters long, only 14 characters are shown. The annunciator indicates more characters to the right. 2. Press Õ to begin editing the equation at the beginning, or press Ö to begin editing the equation at the end. Then press Ö or Õ repeatedly to move the cursor through the equation one character at a time.  and display when there are more characters to the left or right. 3. Press Öor Õ to scroll the long equations in line 2 by a screen. To select an equation: Display the equation in the equation list, as described above. The displayed equation in line 2 is the one that's used for all equation operations. Example: Viewing an Equation. View the last equation you entered. Keys:  Display Õ Ö  Description: Displays the current equation in the equation list. Activates cursor to the left of the equation Activates cursor to the right of the equation Leaves Equation mode. Entering and Evaluating Equations 6-7