Regular Expressions 101

<mrowthe literal text <mrow (case sensitive)

Negated Character Class[^>]*

*matches any number of characters outside the set below:

>the literal > (62₁₀ / 76₈ / 3E₁₆)

\(?optionally matches the literal ( (40₁₀ / 50₈ / 28₁₆)

Group 1((?:(?!</?mrow\b[^>]*>).)*?)

Non-Capturing Group(?:(?!</?mrow\b[^>]*>).)*?

*?repeats the group contents below any number of times:

Negative Lookahead(?!</?mrow\b[^>]*>)

<the literal < (60₁₀ / 74₈ / 3C₁₆)

/?optionally matches the literal / (47₁₀ / 57₈ / 2F₁₆)

mrowthe literal text mrow (case sensitive)

\ba Unicode word boundary

Negated Character Class[^>]*

*matches any number of characters outside the set below:

>the literal > (62₁₀ / 76₈ / 3E₁₆)

.any Unicode character (except for line terminators)

\)?optionally matches the literal ) (41₁₀ / 51₈ / 29₁₆)

</mrow>the literal text </mrow> (case sensitive)

Global pattern flags

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

m modifier: multiline. Causes ^ and $ to match the start and end of each line, not only the start and end of the string

Detailed match information will be displayed here automatically.

Search reference

Regular Expression

<mrow[^>]*>\(?((?:(?!</?mrow\b[^>]*>).)*?)\)?</mrow>

New

<msub><mi>y</mi><mrow>(<mi>n</mi><mo>+</mo><mn>1</mn>)</mrow></msub><mo>=</mo><msub><mi>y</mi><mrow>(<mi>n</mi><mo>-</mo><mn>1</mn>)</mrow></msub><mo>*</mo><msup><mrow>(<msub><mi>y</mi><mi>n()</mi></msub>)</mrow><mrow><mn>2</mn></mrow></msup>

<mrow>(<mn>1000001</mn>)</mrow>

Regular Expression

Substitution