Regular Expressions 101

Negative Lookahead(?![0-9-+*/()x]|abs|pow|ln|pi|e|a?(?:sin|cos|tan)h?)

1st Alternative[0-9-+*/()x]

Character Class[0-9-+*/()x]

0-9one character from 0 (48₁₀) to 9 (57₁₀)

-the literal - (45₁₀ / 55₈ / 2D₁₆)

+the literal + (43₁₀ / 53₈ / 2B₁₆)

*the literal * (42₁₀ / 52₈ / 2A₁₆)

/the literal / (47₁₀ / 57₈ / 2F₁₆)

(the literal ( (40₁₀ / 50₈ / 28₁₆)

)the literal ) (41₁₀ / 51₈ / 29₁₆)

xthe literal x (120₁₀ / 170₈ / 78₁₆) (case sensitive)

2nd Alternativeabs

absthe literal text abs (case sensitive)

3rd Alternativepow

powthe literal text pow (case sensitive)

4th Alternativeln

lnthe literal text ln (case sensitive)

5th Alternativepi

pithe literal text pi (case sensitive)

6th Alternativee

ethe literal e (101₁₀ / 145₈ / 65₁₆) (case sensitive)

7th Alternativea?(?:sin|cos|tan)h?

a?optionally matches the literal a (97₁₀ / 141₈ / 61₁₆) (case sensitive)

Non-Capturing Group(?:sin|cos|tan)

1st Alternativesin

sinthe literal text sin (case sensitive)

2nd Alternativecos

costhe literal text cos (case sensitive)

3rd Alternativetan

tanthe literal text tan (case sensitive)

h?optionally matches the literal h (104₁₀ / 150₈ / 68₁₆) (case sensitive)

\ba Unicode word boundary

Character Class[a-zA-Z]+

+matches at least one character from the set below:

a-zone character from a (97₁₀) to z (122₁₀) (case sensitive)

A-Zone character from A (65₁₀) to Z (90₁₀) (case sensitive)

\ba Unicode word boundary

Global pattern flags

g modifier: global. Finds all matches instead of stopping after the first

Detailed match information will be displayed here automatically.

Search reference

Regular Expression

(?![0-9-+*/()x]|abs|pow|ln|pi|e|a?(?:sin|cos|tan)h?)\b[a-zA-Z]+\b

New

WIDTH+LENGTH*abs(2)