regex101: math chain comparisons with optional matched paren

Explanation

Pro

Negative Lookbehind(?<![-+\/*(\s])

Character Class[-+\/*(\s]

-the literal - (45₁₀ / 55₈ / 2D₁₆)

+the literal + (43₁₀ / 53₈ / 2B₁₆)

\/the literal / (47₁₀ / 57₈ / 2F₁₆)

*the literal * (42₁₀ / 52₈ / 2A₁₆)

(the literal ( (40₁₀ / 50₈ / 28₁₆)

\sa Unicode whitespace character

Group 1((\s*$)?(?:(?:\s*\$Q\w+\s*|\d+\.?\d*\s*)[-+\/*])+(?:\s*\$Q\w+|\d+\.?\d*)\s*(?(2)$))

Group 2(\s*\()?

?repeats the group contents below at most once:

\s*a Unicode whitespace character, repeated any number of times

\(the literal ( (40₁₀ / 50₈ / 28₁₆)

Non-Capturing Group(?:(?:\s*\$Q\w+\s*|\d+\.?\d*\s*)[-+\/*])+

+repeats the group contents below at least once:

Non-Capturing Group(?:\s*\$Q\w+\s*|\d+\.?\d*\s*)

1st Alternative\s*\$Q\w+\s*

\s*a Unicode whitespace character, repeated any number of times

\$the literal $ (36₁₀ / 44₈ / 24₁₆)

Qthe literal Q (81₁₀ / 121₈ / 51₁₆) (case sensitive)

\w+a Unicode word character, repeated at least once

\s*a Unicode whitespace character, repeated any number of times

2nd Alternative\d+\.?\d*\s*

\d+a Unicode decimal digit, repeated at least once

\.?optionally matches the literal . (46₁₀ / 56₈ / 2E₁₆)

\d*a Unicode decimal digit, repeated any number of times

\s*a Unicode whitespace character, repeated any number of times

Character Class[-+\/*]

-the literal - (45₁₀ / 55₈ / 2D₁₆)

+the literal + (43₁₀ / 53₈ / 2B₁₆)

\/the literal / (47₁₀ / 57₈ / 2F₁₆)

*the literal * (42₁₀ / 52₈ / 2A₁₆)

Non-Capturing Group(?:\s*\$Q\w+|\d+\.?\d*)

1st Alternative\s*\$Q\w+

\s*a Unicode whitespace character, repeated any number of times

\$the literal $ (36₁₀ / 44₈ / 24₁₆)

Qthe literal Q (81₁₀ / 121₈ / 51₁₆) (case sensitive)

\w+a Unicode word character, repeated at least once

2nd Alternative\d+\.?\d*

\d+a Unicode decimal digit, repeated at least once

\.?optionally matches the literal . (46₁₀ / 56₈ / 2E₁₆)

\d*a Unicode decimal digit, repeated any number of times

\s*a Unicode whitespace character, repeated any number of times

Condition(?(2)\))

Uses the first branch if group 2 matched

If the condition is true, match this branch:\)

\)the literal ) (41₁₀ / 51₈ / 29₁₆)

Group 3(\s*[=!><]+\s*)

\s*a Unicode whitespace character, repeated any number of times

Character Class[=!><]+

+matches at least one character from the set below:

=the literal = (61₁₀ / 75₈ / 3D₁₆)

!the literal ! (33₁₀ / 41₈ / 21₁₆)

>the literal > (62₁₀ / 76₈ / 3E₁₆)

<the literal < (60₁₀ / 74₈ / 3C₁₆)

\s*a Unicode whitespace character, repeated any number of times

Group 4(\d+\.?\d*)

\d+a Unicode decimal digit, repeated at least once

\.?optionally matches the literal . (46₁₀ / 56₈ / 2E₁₆)

\d*a Unicode decimal digit, repeated any number of times

Global pattern flags

x modifier: extended. Ignores unescaped whitespace and comments outside character classes

Quick Reference

25 tokens

Regular Expression

(?<![-+\/*(\s])((\s*\()?(?:(?:\s*\$Q\w+\s*|\d+\.?\d*\s*)[-+\/*])+(?:\s*\$Q\w+|\d+\.?\d*)\s*(?(2)\)))(\s*[=!><]+\s*)(\d+\.?\d*)

New

hgfhf ( $Q130A + $Q130B + $Q130C + $Q130D + $Q130E + $Q130F+ $Q130G + $Q130H + $Q130I + $Q130J + $Q130K + $Q130L + $Q130M ) != 100

Extraction

hgfhf ( $Q130A + $Q130B + $Q130C + $Q130D + $Q130E + $Q130F+ $Q130G + $Q130H + $Q130I + $Q130J + $Q130K + $Q130L + $Q130M ) != 100