MATH-TYPESET> (render-exp '(fraction 1 (operator-sequence 1 + (fraction 1 (operator-sequence 1 + (fraction 1 (operator-sequence 1 + (fraction 1 (operator-sequence 1 + (fraction 1 (operator-sequence 1 + (fraction 1 (operator-sequence 1 + (fraction 1 (operator-sequence 1 + (fraction 1 (operator-sequence 1 + (fraction 1 (operator-sequence 1 + 1)))))))))))))))))))
                  1                  
-------------------------------------
                    1                
    ---------------------------------
                      1              
        -----------------------------
                        1            
            -------------------------
                          1          
                ---------------------
1 +                         1        
    1 +             -----------------
        1 +                   1      
            1 +         -------------
                1 +             1    
                    1 +     ---------
                        1 +       1  
                            1 + -----
                                1 + 1