ROOT (token: short_text [lag_newlines/spaces] {pos_id})                             
 ¦--expr:  [0/3] {1}                                                                
 ¦   ¦--'{': { [0/0] {2}                                                            
 ¦   ¦--expr:  [0/0] {3}                                                            
 ¦   ¦   ¦--'{': { [0/0] {4}                                                        
 ¦   ¦   ¦--expr:  [0/0] {5}                                                        
 ¦   ¦   ¦   ¦--'(': ( [0/3] {6}                                                    
 ¦   ¦   ¦   ¦--expr:  [0/0] {7}                                                    
 ¦   ¦   ¦   ¦   ¦--'{': { [0/0] {8}                                                
 ¦   ¦   ¦   ¦   ¦--expr:  [0/0] {9}                                                
 ¦   ¦   ¦   ¦   ¦   ¦--'{': { [0/0] {10}                                           
 ¦   ¦   ¦   ¦   ¦   ¦--expr:  [0/0] {11}                                           
 ¦   ¦   ¦   ¦   ¦   ¦   ¦--'{': { [0/0] {12}                                       
 ¦   ¦   ¦   ¦   ¦   ¦   ¦--expr:  [0/0] {13}                                       
 ¦   ¦   ¦   ¦   ¦   ¦   ¦   ¦--'{': { [0/2] {14}                                   
 ¦   ¦   ¦   ¦   ¦   ¦   ¦   ¦--expr:  [0/0] {15}                                   
 ¦   ¦   ¦   ¦   ¦   ¦   ¦   ¦   ¦--'{': { [0/0] {16}                               
 ¦   ¦   ¦   ¦   ¦   ¦   ¦   ¦   ¦--expr:  [0/0] {17}                               
 ¦   ¦   ¦   ¦   ¦   ¦   ¦   ¦   ¦   ¦--'{': { [0/0] {18}                           
 ¦   ¦   ¦   ¦   ¦   ¦   ¦   ¦   ¦   ¦--expr:  [0/0] {19}                           
 ¦   ¦   ¦   ¦   ¦   ¦   ¦   ¦   ¦   ¦   ¦--'{': { [0/0] {20}                       
 ¦   ¦   ¦   ¦   ¦   ¦   ¦   ¦   ¦   ¦   ¦--expr:  [0/0] {21}                       
 ¦   ¦   ¦   ¦   ¦   ¦   ¦   ¦   ¦   ¦   ¦   ¦--'{': { [0/3] {22}                   
 ¦   ¦   ¦   ¦   ¦   ¦   ¦   ¦   ¦   ¦   ¦   ¦--expr:  [0/0] {23}                   
 ¦   ¦   ¦   ¦   ¦   ¦   ¦   ¦   ¦   ¦   ¦   ¦   ¦--'(': ( [0/0] {24}               
 ¦   ¦   ¦   ¦   ¦   ¦   ¦   ¦   ¦   ¦   ¦   ¦   ¦--expr:  [0/0] {25}               
 ¦   ¦   ¦   ¦   ¦   ¦   ¦   ¦   ¦   ¦   ¦   ¦   ¦   ¦--'(': ( [0/2] {26}           
 ¦   ¦   ¦   ¦   ¦   ¦   ¦   ¦   ¦   ¦   ¦   ¦   ¦   ¦--expr:  [1/0] {28}           
 ¦   ¦   ¦   ¦   ¦   ¦   ¦   ¦   ¦   ¦   ¦   ¦   ¦   ¦   °--NUM_CONST: 19 [0/0] {27}
 ¦   ¦   ¦   ¦   ¦   ¦   ¦   ¦   ¦   ¦   ¦   ¦   ¦   °--')': ) [1/0] {29}           
 ¦   ¦   ¦   ¦   ¦   ¦   ¦   ¦   ¦   ¦   ¦   ¦   °--')': ) [0/0] {30}               
 ¦   ¦   ¦   ¦   ¦   ¦   ¦   ¦   ¦   ¦   ¦   °--'}': } [0/0] {31}                   
 ¦   ¦   ¦   ¦   ¦   ¦   ¦   ¦   ¦   ¦   °--'}': } [0/0] {32}                       
 ¦   ¦   ¦   ¦   ¦   ¦   ¦   ¦   ¦   °--'}': } [0/0] {33}                           
 ¦   ¦   ¦   ¦   ¦   ¦   ¦   ¦   °--'}': } [0/0] {34}                               
 ¦   ¦   ¦   ¦   ¦   ¦   ¦   °--'}': } [0/0] {35}                                   
 ¦   ¦   ¦   ¦   ¦   ¦   °--'}': } [0/0] {36}                                       
 ¦   ¦   ¦   ¦   ¦   °--'}': } [0/0] {37}                                           
 ¦   ¦   ¦   ¦   °--'}': } [0/0] {38}                                               
 ¦   ¦   ¦   °--')': ) [0/0] {39}                                                   
 ¦   ¦   °--'}': } [0/0] {40}                                                       
 ¦   °--'}': } [0/0] {41}                                                           
 ¦--expr:  [3/3] {42}                                                               
 ¦   ¦--'(': ( [0/2] {43}                                                           
 ¦   ¦--expr:  [1/3] {44}                                                           
 ¦   ¦   ¦--expr:  [0/0] {46}                                                       
 ¦   ¦   ¦   °--SYMBOL_FUNCTION_CALL: c [0/0] {45}                                  
 ¦   ¦   ¦--'(': ( [0/0] {47}                                                       
 ¦   ¦   ¦--expr:  [0/0] {49}                                                       
 ¦   ¦   ¦   °--STR_CONST: "x" [0/0] {48}                                           
 ¦   ¦   ¦--',': , [0/1] {50}                                                       
 ¦   ¦   ¦--expr:  [0/0] {52}                                                       
 ¦   ¦   ¦   °--STR_CONST: "y" [0/0] {51}                                           
 ¦   ¦   ¦--',': , [0/1] {53}                                                       
 ¦   ¦   ¦--expr:  [0/0] {55}                                                       
 ¦   ¦   ¦   °--STR_CONST: "z" [0/0] {54}                                           
 ¦   ¦   ¦--',': , [0/1] {56}                                                       
 ¦   ¦   ¦--expr:  [0/0] {58}                                                       
 ¦   ¦   ¦   °--STR_CONST: "sin( [0/0] {57}                                         
 ¦   ¦   °--')': ) [0/0] {59}                                                       
 ¦   °--')': ) [1/0] {60}                                                           
 °--expr:  [3/0] {61}                                                               
     ¦--'{': { [0/2] {62}                                                           
     ¦--expr:  [1/0] {63}                                                           
     ¦   ¦--expr:  [0/0] {65}                                                       
     ¦   ¦   °--SYMBOL_FUNCTION_CALL: c [0/0] {64}                                  
     ¦   ¦--'(': ( [0/0] {66}                                                       
     ¦   ¦--expr:  [0/0] {68}                                                       
     ¦   ¦   °--STR_CONST: "x" [0/0] {67}                                           
     ¦   ¦--',': , [0/1] {69}                                                       
     ¦   ¦--expr:  [0/0] {71}                                                       
     ¦   ¦   °--STR_CONST: "y" [0/0] {70}                                           
     ¦   ¦--',': , [0/1] {72}                                                       
     ¦   ¦--expr:  [0/0] {74}                                                       
     ¦   ¦   °--STR_CONST: "z" [0/0] {73}                                           
     ¦   ¦--',': , [0/1] {75}                                                       
     ¦   ¦--expr:  [0/0] {77}                                                       
     ¦   ¦   °--STR_CONST: "sin( [0/0] {76}                                         
     ¦   °--')': ) [0/0] {78}                                                       
     °--'}': } [1/0] {79}                                                           
