Word crashes when trying to insert an equation.

I have Microsoft Office Pro Plus 2013 (64 Bit). I am experiencing a problem with the equation editor in Word 2013 and PowerPoint 2013 (also Excel). In Word when i try to use the equation editor my Word crashes and i must reopen it. In PowerPoint the equation editor also doesn't work as it should but the PowerPoint doesn't crash, also i can see the equations (in Word i can't see the equations) but they look as if the encoding is not correct or something. I have Windows 7 Professional. Does anyone have a clue what might be causing this problem ? Has anyone experienced the same problem ? How can i solve it ?

Problem Signature:

   Problem Event Name: APPCRASH
   Application Name: WINWORD.EXE
   Application Version: 15.0.4454.1004
   Application Timestamp: 50bdaa50
   Fault Module Name: mso.dll
   Fault Module Version: 15.0.4454.1002
   Fault Module Timestamp: 50ac2609
   Exception Code: c0000005
   Exception Offset: 00000000002bc50a
   OS Version: 6.1.7601.2.1.0.256.48
   Locale ID: 1031

Additional information about the problem:
   LCID: 1033
   skulcid: 1033

Hear are the Photos of my Problem:

Word 2013

PowerPoint 2013