Word Problem

Mrs. Smith's grade two class is studying geese.  The geese have started to return from their winter migration.  During a class field trip to a local park the class saw two flocks of geese land in two different ponds.  The first pond had 72 geese in it.  The other pond had 89 geese in it. 

Write the math equation: ______________________

How many geese did Mrs. Smith's class see? _______

Show your work!