G Math for Google Docs (Writing Math Tests, etc)
There is an add on in Google Docs called Gmath that makes it super easy to add fractions and math equations to a Google Doc. For teachers in my district, it is really handy for writing collaborative assignments. Go to the add-on menu in Google Docs and forms to use it.
You will have to enroll by answering questions - this only happens once. Make sure you choose Hallsville, TEXAS as your school. Then, start adding math problems!