Regex Tester & Validator

This regular expression is designed to match mixed fractions and fractions separated by mathematical operators like plus or minus. It captures a whole number followed by a space, pipe, or plus/minus sign, and then a standard fraction format (numerator/denominator). It uses a negative lookahead to prevent matching expressions that might be part of a longer subtraction sequence. It is useful for extracting numerical fractions from text, possibly for converting them to decimal values.