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The [https://www.desmos.com/scientific Desmos Scientific Calculator] handles our given equation correctly. The error checking appears to be built into the division key.
Entering the equation into a programming language, or low quality calculator , requires the explicit multiplication symbol and outer parenthesisto maintain the grouping.
'''6÷2(1+2) == 6÷(2*(1+2))'''
Entering the equation as 6/2(1+2) into a cell in a LibreOffice Calc spreadsheet will result in Err:509 (Missing operator) This forces the user to format the equation using explicit multiplication. To avoid the left to right problem in programming languages, the compiler must be instructed in advance to prepare for the function with an extra pair of parenthesis 6/(2*(1+2)).