Mathematics open numerator- Mn(

- Instruction: Mn( - Parameter: none - Return: true if the numerator is opened. - Description: This instruction returns true if the opening round bracket opens the numerator of a complex fraction. The instruction should only be used on the open round bracket "(". - Examples: Text string: ( Braille string: 123456 Condition: Mn( Description: In the fraction "(2+4)/(5+4)", the parenthesis "(" of the numerator is transcribed with the cell "123456", provided that the other parentheses and the fraction have been properly encoded with the numerator and denominator instructions.