60-1
compute  output-item-1*  ...  =  arithm-expression-2*  error-phrases*
    

                                                                Det-1
output-item-1*
   Dat9-1  [rounded]

arithm-expression-2*
  ([+,-]  Dat9-3   [+,-,*,/,**  Dat9-4]  ...        )  ...
          Lit9-3                Lit9-4
          arithm-expression-3*  arithm-expression-4*

output-item*
   Dat9-2  [rounded]

error-phrases*
   [size error
      imperative-statements-1*]
   [not size error                                               85-1
      imperative-statements-2*]
   [end-compute/add/subtract/multiply/divide]
    .

Remark:
   () parenthesis are recommended in greater expressions

MX limitation:
   phrases
      not size error and end-... are not implemented
    

                                                                 60-1
add  Dat9-1  ...  to  output-item*  ...  error-phrases*
     Lit9-1
    

                                                                 60-2
add  Dat9-1  ...  giving  output-item*  ...  error-phrases*
     Lit9-1
    

                                                                 68-3
add  corr  DatG-1  to  DatG-2  [rounded]  error-phrases*

MX limitation:
   this format is not implemented
    

                                                                 60-1
subtract  Dat9-1  ...  from  output-item*  ...  error-phrases*
          Lit9-1
    

                                                                 60-2
subtract  Dat9-1  ...  from  output-item*  ...  error-phrases*
          Lit9-1
    

                                                                 68-3
subtract  corr  DatG-1  from  DatG-2  [rounded]  error-phrases*

MX limitation:
   this format is not implemented
    

                                                                   60-1
multiply  Dat9-1  by  output-item*  ...  error-phrases*
          Lit9-1
    

                                                                   60-2
multiply  Dat9-1  by  Dat9-3  giving  output-item*  ...  error-phrases*
          Lit9-1      Lit9-3
    

                                                                   60-1
divide  Dat9-1  into  output-item*  ...  error-phrases*
        Lit9-1
    

                                                                   60-2
divide  Dat9-1  into  Dat9-3  giving  output-item*  ...  error-phrases*
        Lit9-1  by    Lit9-3
    

                                                                   60-3
divide  Dat9-1  into  Dat9-3  giving  output-item*
        Lit9-1  by    Lit9-3

   remainder  Dat9-4  error-phrases*