See it in action

Built for real math workflows

One input box. Every algebraic operation. Batch process an entire problem set in seconds.

Polynomial expansion — batch input and results

Expand Polynomials

Paste any number of expressions and expand them all at once. Results appear instantly in the Solutions pane.

Factor Expressions

Switch to factor mode with a single @:factor directive. Handles difference of squares, trinomials, cubes, and grouping.

Full range — expand, factor, solve, differentiate, integrate in one batch

Every Operation in One Batch

Mix expand, factor, solve, differentiate, and integrate in a single input using @: mode switches. PAE Bird handles each section correctly.

Worksheet Output

Generate formatted worksheets with numbered problems and solutions — ready for students or educators to print and use.

Built-in Command Reference

Every supported operation and @: directive documented inside the app. No external docs needed.

Microsoft Excel®

Available for Download

PAE Bird as Excel Functions

Use PAE Bird's math engine directly inside Excel cells — no app switching, no copy-paste. Solve, expand, factor, differentiate, integrate, and work with matrices as native spreadsheet formulas.

⬇ Download manifest.xml ⬇ Download starter workbook

Sideload the manifest first (see below), then open the starter workbook — 38 functions pre-filled as worked examples.

How to sideload (first-time setup)

Download manifest.xml above.
On Mac: open Finder, press Cmd+Shift+G, and go to:
~/Library/Containers/com.microsoft.Excel/Data/Documents/wef
(create the wef folder if it doesn't already exist), then copy manifest.xml into it.
On Windows, or Excel on the web: in Excel, go to Home → Add-ins → More Settings, choose Upload My Add-in on the Office Add-ins dialog, then browse to and select manifest.xml.
Open (or restart) Excel and open any workbook.
On Mac, go to Home → Add-ins and select PAE Bird from the menu that appears.
The PAE Bird button/task pane appears, and formulas like =PAE.SOLVE(...) work in any cell.

Official Microsoft instructions: Mac · Windows / web

=PAE.SOLVE("x^2 - 5x + 6 = 0") =PAE.EXPAND("(2x-1)^3") =PAE.FACTOR("2x^2 + 6x + 4") =PAE.DIFFERENTIATE("x^3 + 2x","x") =PAE.INTEGRATE("3x^2","x")

PAE Bird Excel add-in — function results

All five PAE functions returning results live in Excel cells.

PAE Bird Excel — formula bar showing =PAE.SOLVE()

Native Excel formula syntax — type it just like any other function.

Generate Student and Teacher worksheets directly from the task pane.

3.1415926535897932384626433832795028841971693993751058209749445923078164062862089986280348253421170679821480865132823066470938446095505822317253594081284811174502841027019385211055596446229489549303819644288109756659334461284756482337867831652712019091456485669234603486104543266482133936072602491412737245870066063155881748815209209628292540917153643678925903600113305305488204665213841469519415116094330572703657595919530921861173819326117931051185480744623799627495673518857527248912279381830119491298336733624406566430860213949463952247371907021798609437027705392171762931767523846748184676694051320005681271452635608277857713427577896091736371787214684409012249534301465495853710507922796892589235420199561121290219608640344181598136297747713099605187072113499999983729780499510597317328160963185950244594553469083026425223082533446850352619311881710100031378387528865875332083814206171776691473035982534904287554687311595628638823537875937519577818577805321712268066130019278766111959092164201989 3.1415926535897932384626433832795028841971693993751058209749445923078164062862089986280348253421170679821480865132823066470938446095505822317253594081284811174502841027019385211055596446229489549303819644288109756659334461284756482337867831652712019091456485669234603486104543266482133936072602491412737245870066063155881748815209209628292540917153643678925903600113305305488204665213841469519415116094330572703657595919530921861173819326117931051185480744623799627495673518857527248912279381830119491298336733624406566430860213949463952247371907021798609437027705392171762931767523846748184676694051320005681271452635608277857713427577896091736371787214684409012249534301465495853710507922796892589235420199561121290219608640344181598136297747713099605187072113499999983729780499510597317328160963185950244594553469083026425223082533446850352619311881710100031378387528865875332083814206171776691473035982534904287554687311595628638823537875937519577818577805321712268066130019278766111959092164201989 3.1415926535897932384626433832795028841971693993751058209749445923078164062862089986280348253421170679821480865132823066470938446095505822317253594081284811174502841027019385211055596446229489549303819644288109756659334461284756482337867831652712019091456485669234603486104543266482133936072602491412737245870066063155881748815209209628292540917153643678925903600113305305488204665213841469519415116094330572703657595919530921861173819326117931051185480744623799627495673518857527248912279381830119491298336733624406566430860213949463952247371907021798609437027705392171762931767523846748184676694051320005681271452635608277857713427577896091736371787214684409012249534301465495853710507922796892589235420199561121290219608640344181598136297747713099605187072113499999983729780499510597317328160963185950244594553469083026425223082533446850352619311881710100031378387528865875332083814206171776691473035982534904287554687311595628638823537875937519577818577805321712268066130019278766111959092164201989 3.1415926535897932384626433832795028841971693993751058209749445923078164062862089986280348253421170679821480865132823066470938446095505822317253594081284811174502841027019385211055596446229489549303819644288109756659334461284756482337867831652712019091456485669234603486104543266482133936072602491412737245870066063155881748815209209628292540917153643678925903600113305305488204665213841469519415116094330572703657595919530921861173819326117931051185480744623799627495673518857527248912279381830119491298336733624406566430860213949463952247371907021798609437027705392171762931767523846748184676694051320005681271452635608277857713427577896091736371787214684409012249534301465495853710507922796892589235420199561121290219608640344181598136297747713099605187072113499999983729780499510597317328160963185950244594553469083026425223082533446850352619311881710100031378387528865875332083814206171776691473035982534904287554687311595628638823537875937519577818577805321712268066130019278766111959092164201989

0 1 1 2 3 5 8 13 21 34 55 89 144 233 377 610 987 1,597 2,584 4,181 6,765 10,946 17,711 28,657 46,368 75,025 121,393 196,418 317,811 514,229 832,040 1,346,269 2,178,309 3,524,578 5,702,887 9,227,465 14,930,352 24,157,817 39,088,169 63,245,986 102,334,155 165,580,141 267,914,296 433,494,437 701,408,733 0 1 1 2 3 5 8 13 21 34 55 89 144 233 377 610 987 1,597 2,584 4,181 6,765 10,946 17,711 28,657 46,368 75,025 121,393 196,418 317,811 514,229 832,040 1,346,269 2,178,309 3,524,578 5,702,887 9,227,465 14,930,352 24,157,817 39,088,169 63,245,986 102,334,155 165,580,141 267,914,296 433,494,437 701,408,733 0 1 1 2 3 5 8 13 21 34 55 89 144 233 377 610 987 1,597 2,584 4,181 6,765 10,946 17,711 28,657 46,368 75,025 121,393 196,418 317,811 514,229 832,040 1,346,269 2,178,309 3,524,578 5,702,887 9,227,465 14,930,352 24,157,817 39,088,169 63,245,986 102,334,155 165,580,141 267,914,296 433,494,437 701,408,733 0 1 1 2 3 5 8 13 21 34 55 89 144 233 377 610 987 1,597 2,584 4,181 6,765 10,946 17,711 28,657 46,368 75,025 121,393 196,418 317,811 514,229 832,040 1,346,269 2,178,309 3,524,578 5,702,887 9,227,465 14,930,352 24,157,817 39,088,169 63,245,986 102,334,155 165,580,141 267,914,296 433,494,437 701,408,733 0 1 1 2 3 5 8 13 21 34 55 89 144 233 377 610 987 1,597 2,584 4,181 6,765 10,946 17,711 28,657 46,368 75,025 121,393 196,418 317,811 514,229 832,040 1,346,269 2,178,309 3,524,578 5,702,887 9,227,465 14,930,352 24,157,817 39,088,169 63,245,986 102,334,155 165,580,141 267,914,296 433,494,437 701,408,733 0 1 1 2 3 5 8 13 21 34 55 89 144 233 377 610 987 1,597 2,584 4,181 6,765 10,946 17,711 28,657 46,368 75,025 121,393 196,418 317,811 514,229 832,040 1,346,269 2,178,309 3,524,578 5,702,887 9,227,465 14,930,352 24,157,817 39,088,169 63,245,986 102,334,155 165,580,141 267,914,296 433,494,437 701,408,733 0 1 1 2 3 5 8 13 21 34 55 89 144 233 377 610 987 1,597 2,584 4,181 6,765 10,946 17,711 28,657 46,368 75,025 121,393 196,418 317,811 514,229 832,040 1,346,269 2,178,309 3,524,578 5,702,887 9,227,465 14,930,352 24,157,817 39,088,169 63,245,986 102,334,155 165,580,141 267,914,296 433,494,437 701,408,733 0 1 1 2 3 5 8 13 21 34 55 89 144 233 377 610 987 1,597 2,584 4,181 6,765 10,946 17,711 28,657 46,368 75,025 121,393 196,418 317,811 514,229 832,040 1,346,269 2,178,309 3,524,578 5,702,887 9,227,465 14,930,352 24,157,817 39,088,169 63,245,986 102,334,155 165,580,141 267,914,296 433,494,437 701,408,733

PAE Bird ™

What PAE Bird does

Polynomial Expansion

Factoring

Solving

Calculus

Batch Processing

Worksheet Generator

Built for real math workflows

Expand Polynomials

Factor Expressions

Every Operation in One Batch

Worksheet Output

Built-in Command Reference

PAE Bird as Excel Functions

PAE Bird in Google Sheets™

PAE Bird for LibreOffice Calc

Downloads

Mac App

Excel

LibreOffice Calc

Google Sheets™

Built for

About Stewart Breier

Get PAE Bird for Mac