SHELL_SCRIPT
  COMMANDS_LIST
    SHELL_COMMAND
      ARITHMETIC_EXPANSION
        PsiElement(()('(')
        PsiElement(()('(')
        COMMA_EXPRESSION
          LITERAL_EXPRESSION
            NUMBER
              PsiElement(int)('1')
          PsiElement(,)(',')
          LITERAL_EXPRESSION
            NUMBER
              PsiElement(int)('2')
        PsiElement())(')')
        PsiElement())(')')
  PsiElement(\n)('\n')
  COMMANDS_LIST
    SHELL_COMMAND
      ARITHMETIC_EXPANSION
        PsiElement(()('(')
        PsiElement(()('(')
        COMMA_EXPRESSION
          LITERAL_EXPRESSION
            VARIABLE
              PsiElement(var)('$a')
          PsiElement(,)(',')
          LITERAL_EXPRESSION
            PsiElement(word)('b')
        PsiElement())(')')
        PsiElement())(')')
  PsiElement(\n)('\n')
  COMMANDS_LIST
    SHELL_COMMAND
      ARITHMETIC_EXPANSION
        PsiElement(()('(')
        PsiElement(()('(')
        COMMA_EXPRESSION
          COMMA_EXPRESSION
            LITERAL_EXPRESSION
              VARIABLE
                PsiElement(var)('$a')
            PsiElement(,)(',')
            MUL_EXPRESSION
              LITERAL_EXPRESSION
                NUMBER
                  PsiElement(int)('1')
              PsiElement(*)('*')
              LITERAL_EXPRESSION
                NUMBER
                  PsiElement(int)('3')
          PsiElement(,)(',')
          LITERAL_EXPRESSION
            PsiElement(word)('b')
        PsiElement())(')')
        PsiElement())(')')