Copy the formula from the Windows 7 Math Input Panel to the clipboard using Powershell 2.0

 Add-Type -AssemblyName PresentationCore
 $ dataObject = [Windows.Clipboard] :: GetDataObject ()
 $ memoryStream = $ dataObject.GetData ("MathML")
 if ($ memoryStream) {
     $ streamReader = [System.IO.StreamReader] ($ memoryStream)
     $ mathML = $ streamReader.ReadToEnd ()
     [Windows.Clipboard] :: SetText ($ mathML)
 }